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Finding the Fourth Proportional to 109,618.08, 151,279.76 and 61,854

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Solution

The fourth proportional to 109,618.08, 151,279.76 and 61,854 is: 85,362.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,618.08 : 151,279.76 = 61,854 : x
  2. Step 2: Convert to fraction form
    109,618.08/151,279.76 = 61,854/x
  3. Step 3: Cross multiply
    109,618.08x = 151,279.76 × 61,854
  4. Step 4: Simplify right side
    109,618.08x = 9,357,258,275.04
  5. Step 5: Solve for x
    x = 9,357,258,275.04/109,618.08
  6. Step 6: Final answer
    x = 85,362.36

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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.