Home / 99,701.06-149,359.65-78,529.10

Finding the Fourth Proportional to 99,701.06, 149,359.65 and 78,529.10

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Solution

The fourth proportional to 99,701.06, 149,359.65 and 78,529.10 is: 117,642.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,701.06 : 149,359.65 = 78,529.10 : x
  2. Step 2: Convert to fraction form
    99,701.06/149,359.65 = 78,529.10/x
  3. Step 3: Cross multiply
    99,701.06x = 149,359.65 × 78,529.10
  4. Step 4: Simplify right side
    99,701.06x = 11,729,078,890.82
  5. Step 5: Solve for x
    x = 11,729,078,890.82/99,701.06
  6. Step 6: Final answer
    x = 117,642.47

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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.