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Finding the Fourth Proportional to 145,479.72, 200,760.70 and 81,816.15

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Solution

The fourth proportional to 145,479.72, 200,760.70 and 81,816.15 is: 112,905.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,479.72 : 200,760.70 = 81,816.15 : x
  2. Step 2: Convert to fraction form
    145,479.72/200,760.70 = 81,816.15/x
  3. Step 3: Cross multiply
    145,479.72x = 200,760.70 × 81,816.15
  4. Step 4: Simplify right side
    145,479.72x = 16,425,467,545.31
  5. Step 5: Solve for x
    x = 16,425,467,545.31/145,479.72
  6. Step 6: Final answer
    x = 112,905.55

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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.