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Finding the Fourth Proportional to 281,088.80, 387,899.40 and 153,762.88

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Solution

The fourth proportional to 281,088.80, 387,899.40 and 153,762.88 is: 212,191.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,088.80 : 387,899.40 = 153,762.88 : x
  2. Step 2: Convert to fraction form
    281,088.80/387,899.40 = 153,762.88/x
  3. Step 3: Cross multiply
    281,088.80x = 387,899.40 × 153,762.88
  4. Step 4: Simplify right side
    281,088.80x = 59,644,528,894.27
  5. Step 5: Solve for x
    x = 59,644,528,894.27/281,088.80
  6. Step 6: Final answer
    x = 212,191.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.