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Finding the Fourth Proportional to 145,399.68, 218,010.20 and 56,549.62

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Solution

The fourth proportional to 145,399.68, 218,010.20 and 56,549.62 is: 84,789.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,399.68 : 218,010.20 = 56,549.62 : x
  2. Step 2: Convert to fraction form
    145,399.68/218,010.20 = 56,549.62/x
  3. Step 3: Cross multiply
    145,399.68x = 218,010.20 × 56,549.62
  4. Step 4: Simplify right side
    145,399.68x = 12,328,393,966.12
  5. Step 5: Solve for x
    x = 12,328,393,966.12/145,399.68
  6. Step 6: Final answer
    x = 84,789.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.