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Finding the Fourth Proportional to 71,389.68, 98,486.34 and 42,693.54

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Solution

The fourth proportional to 71,389.68, 98,486.34 and 42,693.54 is: 58,898.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,389.68 : 98,486.34 = 42,693.54 : x
  2. Step 2: Convert to fraction form
    71,389.68/98,486.34 = 42,693.54/x
  3. Step 3: Cross multiply
    71,389.68x = 98,486.34 × 42,693.54
  4. Step 4: Simplify right side
    71,389.68x = 4,204,730,496.24
  5. Step 5: Solve for x
    x = 4,204,730,496.24/71,389.68
  6. Step 6: Final answer
    x = 58,898.30

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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.