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Finding the Fourth Proportional to 145,712.48, 218,439.04 and 56,945.78

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Solution

The fourth proportional to 145,712.48, 218,439.04 and 56,945.78 is: 85,367.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,712.48 : 218,439.04 = 56,945.78 : x
  2. Step 2: Convert to fraction form
    145,712.48/218,439.04 = 56,945.78/x
  3. Step 3: Cross multiply
    145,712.48x = 218,439.04 × 56,945.78
  4. Step 4: Simplify right side
    145,712.48x = 12,439,181,515.25
  5. Step 5: Solve for x
    x = 12,439,181,515.25/145,712.48
  6. Step 6: Final answer
    x = 85,367.99

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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.