Home / 287,387,999.40-431,081,999.10-134,049,556.20

Finding the Fourth Proportional to 287,387,999.40, 431,081,999.10 and 134,049,556.20

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Solution

The fourth proportional to 287,387,999.40, 431,081,999.10 and 134,049,556.20 is: 201,074,334.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,387,999.40 : 431,081,999.10 = 134,049,556.20 : x
  2. Step 2: Convert to fraction form
    287,387,999.40/431,081,999.10 = 134,049,556.20/x
  3. Step 3: Cross multiply
    287,387,999.40x = 431,081,999.10 × 134,049,556.20
  4. Step 4: Simplify right side
    287,387,999.40x = 57,786,350,665,163,800
  5. Step 5: Solve for x
    x = 57,786,350,665,163,800/287,387,999.40
  6. Step 6: Final answer
    x = 201,074,334.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.