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Finding the Fourth Proportional to 103,482.72, 155,332.66 and 91,711.80

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Solution

The fourth proportional to 103,482.72, 155,332.66 and 91,711.80 is: 137,663.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,482.72 : 155,332.66 = 91,711.80 : x
  2. Step 2: Convert to fraction form
    103,482.72/155,332.66 = 91,711.80/x
  3. Step 3: Cross multiply
    103,482.72x = 155,332.66 × 91,711.80
  4. Step 4: Simplify right side
    103,482.72x = 14,245,837,847.39
  5. Step 5: Solve for x
    x = 14,245,837,847.39/103,482.72
  6. Step 6: Final answer
    x = 137,663.93

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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.