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Finding the Fourth Proportional to 109,479.40, 151,081.50 and 59,178.40

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Solution

The fourth proportional to 109,479.40, 151,081.50 and 59,178.40 is: 81,666.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,479.40 : 151,081.50 = 59,178.40 : x
  2. Step 2: Convert to fraction form
    109,479.40/151,081.50 = 59,178.40/x
  3. Step 3: Cross multiply
    109,479.40x = 151,081.50 × 59,178.40
  4. Step 4: Simplify right side
    109,479.40x = 8,940,761,439.60
  5. Step 5: Solve for x
    x = 8,940,761,439.60/109,479.40
  6. Step 6: Final answer
    x = 81,666.15

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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.