Home / 75,320.13-112,758.30-65,978.40

Finding the Fourth Proportional to 75,320.13, 112,758.30 and 65,978.40

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Solution

The fourth proportional to 75,320.13, 112,758.30 and 65,978.40 is: 98,773.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,320.13 : 112,758.30 = 65,978.40 : x
  2. Step 2: Convert to fraction form
    75,320.13/112,758.30 = 65,978.40/x
  3. Step 3: Cross multiply
    75,320.13x = 112,758.30 × 65,978.40
  4. Step 4: Simplify right side
    75,320.13x = 7,439,612,220.72
  5. Step 5: Solve for x
    x = 7,439,612,220.72/75,320.13
  6. Step 6: Final answer
    x = 98,773.23

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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.