Home / 86,830.10-129,899.55-75,271.70

Finding the Fourth Proportional to 86,830.10, 129,899.55 and 75,271.70

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Solution

The fourth proportional to 86,830.10, 129,899.55 and 75,271.70 is: 112,607.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,830.10 : 129,899.55 = 75,271.70 : x
  2. Step 2: Convert to fraction form
    86,830.10/129,899.55 = 75,271.70/x
  3. Step 3: Cross multiply
    86,830.10x = 129,899.55 × 75,271.70
  4. Step 4: Simplify right side
    86,830.10x = 9,777,759,957.74
  5. Step 5: Solve for x
    x = 9,777,759,957.74/86,830.10
  6. Step 6: Final answer
    x = 112,607.95

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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.