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Finding the Fourth Proportional to 81,988.88, 122,985.24 and 29,397.20

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Solution

The fourth proportional to 81,988.88, 122,985.24 and 29,397.20 is: 44,096.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,988.88 : 122,985.24 = 29,397.20 : x
  2. Step 2: Convert to fraction form
    81,988.88/122,985.24 = 29,397.20/x
  3. Step 3: Cross multiply
    81,988.88x = 122,985.24 × 29,397.20
  4. Step 4: Simplify right side
    81,988.88x = 3,615,421,697.33
  5. Step 5: Solve for x
    x = 3,615,421,697.33/81,988.88
  6. Step 6: Final answer
    x = 44,096.49

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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.