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Finding the Fourth Proportional to 91,099.04, 136,700.40 and 72,747.68

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Solution

The fourth proportional to 91,099.04, 136,700.40 and 72,747.68 is: 109,162.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,099.04 : 136,700.40 = 72,747.68 : x
  2. Step 2: Convert to fraction form
    91,099.04/136,700.40 = 72,747.68/x
  3. Step 3: Cross multiply
    91,099.04x = 136,700.40 × 72,747.68
  4. Step 4: Simplify right side
    91,099.04x = 9,944,636,955.07
  5. Step 5: Solve for x
    x = 9,944,636,955.07/91,099.04
  6. Step 6: Final answer
    x = 109,162.92

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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.