Home / 258,130.30-387,108.12-98,168.23

Finding the Fourth Proportional to 258,130.30, 387,108.12 and 98,168.23

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Solution

The fourth proportional to 258,130.30, 387,108.12 and 98,168.23 is: 147,219.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,130.30 : 387,108.12 = 98,168.23 : x
  2. Step 2: Convert to fraction form
    258,130.30/387,108.12 = 98,168.23/x
  3. Step 3: Cross multiply
    258,130.30x = 387,108.12 × 98,168.23
  4. Step 4: Simplify right side
    258,130.30x = 38,001,718,959.03
  5. Step 5: Solve for x
    x = 38,001,718,959.03/258,130.30
  6. Step 6: Final answer
    x = 147,219.13

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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.