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Finding the Fourth Proportional to 145,157.80, 217,736.72 and 45,326.55

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Solution

The fourth proportional to 145,157.80, 217,736.72 and 45,326.55 is: 67,989.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,157.80 : 217,736.72 = 45,326.55 : x
  2. Step 2: Convert to fraction form
    145,157.80/217,736.72 = 45,326.55/x
  3. Step 3: Cross multiply
    145,157.80x = 217,736.72 × 45,326.55
  4. Step 4: Simplify right side
    145,157.80x = 9,869,254,325.92
  5. Step 5: Solve for x
    x = 9,869,254,325.92/145,157.80
  6. Step 6: Final answer
    x = 67,989.83

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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.