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Finding the Fourth Proportional to 71,146.61, 98,188.53 and 39,321.66

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Solution

The fourth proportional to 71,146.61, 98,188.53 and 39,321.66 is: 54,267.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,146.61 : 98,188.53 = 39,321.66 : x
  2. Step 2: Convert to fraction form
    71,146.61/98,188.53 = 39,321.66/x
  3. Step 3: Cross multiply
    71,146.61x = 98,188.53 × 39,321.66
  4. Step 4: Simplify right side
    71,146.61x = 3,860,935,501.62
  5. Step 5: Solve for x
    x = 3,860,935,501.62/71,146.61
  6. Step 6: Final answer
    x = 54,267.32

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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.