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Finding the Fourth Proportional to 109,442.55, 151,030.72 and 61,695.90

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Solution

The fourth proportional to 109,442.55, 151,030.72 and 61,695.90 is: 85,140.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,442.55 : 151,030.72 = 61,695.90 : x
  2. Step 2: Convert to fraction form
    109,442.55/151,030.72 = 61,695.90/x
  3. Step 3: Cross multiply
    109,442.55x = 151,030.72 × 61,695.90
  4. Step 4: Simplify right side
    109,442.55x = 9,317,975,505.61
  5. Step 5: Solve for x
    x = 9,317,975,505.61/109,442.55
  6. Step 6: Final answer
    x = 85,140.34

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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.