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Finding the Fourth Proportional to 73,776.15, 109,963.85 and 71,346.15

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Solution

The fourth proportional to 73,776.15, 109,963.85 and 71,346.15 is: 106,341.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,776.15 : 109,963.85 = 71,346.15 : x
  2. Step 2: Convert to fraction form
    73,776.15/109,963.85 = 71,346.15/x
  3. Step 3: Cross multiply
    73,776.15x = 109,963.85 × 71,346.15
  4. Step 4: Simplify right side
    73,776.15x = 7,845,496,979.95
  5. Step 5: Solve for x
    x = 7,845,496,979.95/73,776.15
  6. Step 6: Final answer
    x = 106,341.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.