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Finding the Fourth Proportional to 99,670.53, 137,491.50 and 61,438.41

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Solution

The fourth proportional to 99,670.53, 137,491.50 and 61,438.41 is: 84,751.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,670.53 : 137,491.50 = 61,438.41 : x
  2. Step 2: Convert to fraction form
    99,670.53/137,491.50 = 61,438.41/x
  3. Step 3: Cross multiply
    99,670.53x = 137,491.50 × 61,438.41
  4. Step 4: Simplify right side
    99,670.53x = 8,447,259,148.52
  5. Step 5: Solve for x
    x = 8,447,259,148.52/99,670.53
  6. Step 6: Final answer
    x = 84,751.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.