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Finding the Fourth Proportional to 145,312.20, 217,895.40 and 66,337.20

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Solution

The fourth proportional to 145,312.20, 217,895.40 and 66,337.20 is: 99,472.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,312.20 : 217,895.40 = 66,337.20 : x
  2. Step 2: Convert to fraction form
    145,312.20/217,895.40 = 66,337.20/x
  3. Step 3: Cross multiply
    145,312.20x = 217,895.40 × 66,337.20
  4. Step 4: Simplify right side
    145,312.20x = 14,454,570,728.88
  5. Step 5: Solve for x
    x = 14,454,570,728.88/145,312.20
  6. Step 6: Final answer
    x = 99,472.52

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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.