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Finding the Fourth Proportional to 99,767.70, 149,651.55 and 86,937.30

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Solution

The fourth proportional to 99,767.70, 149,651.55 and 86,937.30 is: 130,405.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,767.70 : 149,651.55 = 86,937.30 : x
  2. Step 2: Convert to fraction form
    99,767.70/149,651.55 = 86,937.30/x
  3. Step 3: Cross multiply
    99,767.70x = 149,651.55 × 86,937.30
  4. Step 4: Simplify right side
    99,767.70x = 13,010,301,697.82
  5. Step 5: Solve for x
    x = 13,010,301,697.82/99,767.70
  6. Step 6: Final answer
    x = 130,405.95

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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.