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Finding the Fourth Proportional to 71,407.13, 98,541.86 and 39,580.83

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Solution

The fourth proportional to 71,407.13, 98,541.86 and 39,580.83 is: 54,621.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,407.13 : 98,541.86 = 39,580.83 : x
  2. Step 2: Convert to fraction form
    71,407.13/98,541.86 = 39,580.83/x
  3. Step 3: Cross multiply
    71,407.13x = 98,541.86 × 39,580.83
  4. Step 4: Simplify right side
    71,407.13x = 3,900,368,410.64
  5. Step 5: Solve for x
    x = 3,900,368,410.64/71,407.13
  6. Step 6: Final answer
    x = 54,621.56

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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.