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Finding the Fourth Proportional to 91,603.35, 137,424.65 and 28,422.11

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Solution

The fourth proportional to 91,603.35, 137,424.65 and 28,422.11 is: 42,639.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,603.35 : 137,424.65 = 28,422.11 : x
  2. Step 2: Convert to fraction form
    91,603.35/137,424.65 = 28,422.11/x
  3. Step 3: Cross multiply
    91,603.35x = 137,424.65 × 28,422.11
  4. Step 4: Simplify right side
    91,603.35x = 3,905,898,720.46
  5. Step 5: Solve for x
    x = 3,905,898,720.46/91,603.35
  6. Step 6: Final answer
    x = 42,639.26

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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.