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Finding the Fourth Proportional to 145,530.40, 218,252.40 and 56,732.80

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Solution

The fourth proportional to 145,530.40, 218,252.40 and 56,732.80 is: 85,082.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,530.40 : 218,252.40 = 56,732.80 : x
  2. Step 2: Convert to fraction form
    145,530.40/218,252.40 = 56,732.80/x
  3. Step 3: Cross multiply
    145,530.40x = 218,252.40 × 56,732.80
  4. Step 4: Simplify right side
    145,530.40x = 12,382,069,758.72
  5. Step 5: Solve for x
    x = 12,382,069,758.72/145,530.40
  6. Step 6: Final answer
    x = 85,082.36

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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.