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Finding the Fourth Proportional to 67,486.40, 101,320.80 and 39,435.20

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Solution

The fourth proportional to 67,486.40, 101,320.80 and 39,435.20 is: 59,206.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,486.40 : 101,320.80 = 39,435.20 : x
  2. Step 2: Convert to fraction form
    67,486.40/101,320.80 = 39,435.20/x
  3. Step 3: Cross multiply
    67,486.40x = 101,320.80 × 39,435.20
  4. Step 4: Simplify right side
    67,486.40x = 3,995,606,012.16
  5. Step 5: Solve for x
    x = 3,995,606,012.16/67,486.40
  6. Step 6: Final answer
    x = 59,206.09

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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.