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Finding the Fourth Proportional to 85,915.83, 128,842.86 and 29,740.71

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Solution

The fourth proportional to 85,915.83, 128,842.86 and 29,740.71 is: 44,600.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,915.83 : 128,842.86 = 29,740.71 : x
  2. Step 2: Convert to fraction form
    85,915.83/128,842.86 = 29,740.71/x
  3. Step 3: Cross multiply
    85,915.83x = 128,842.86 × 29,740.71
  4. Step 4: Simplify right side
    85,915.83x = 3,831,878,134.83
  5. Step 5: Solve for x
    x = 3,831,878,134.83/85,915.83
  6. Step 6: Final answer
    x = 44,600.37

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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.