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Finding the Fourth Proportional to 145,157.96, 217,680.96 and 56,399.78

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Solution

The fourth proportional to 145,157.96, 217,680.96 and 56,399.78 is: 84,577.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,157.96 : 217,680.96 = 56,399.78 : x
  2. Step 2: Convert to fraction form
    145,157.96/217,680.96 = 56,399.78/x
  3. Step 3: Cross multiply
    145,157.96x = 217,680.96 × 56,399.78
  4. Step 4: Simplify right side
    145,157.96x = 12,277,158,254.19
  5. Step 5: Solve for x
    x = 12,277,158,254.19/145,157.96
  6. Step 6: Final answer
    x = 84,577.92

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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.