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Finding the Fourth Proportional to 145,235.01, 200,443.11 and 81,572.80

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Solution

The fourth proportional to 145,235.01, 200,443.11 and 81,572.80 is: 112,581.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,235.01 : 200,443.11 = 81,572.80 : x
  2. Step 2: Convert to fraction form
    145,235.01/200,443.11 = 81,572.80/x
  3. Step 3: Cross multiply
    145,235.01x = 200,443.11 × 81,572.80
  4. Step 4: Simplify right side
    145,235.01x = 16,350,705,723.41
  5. Step 5: Solve for x
    x = 16,350,705,723.41/145,235.01
  6. Step 6: Final answer
    x = 112,581.02

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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.