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Finding the Fourth Proportional to 88,693.90, 133,040.85 and 78,325.90

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Solution

The fourth proportional to 88,693.90, 133,040.85 and 78,325.90 is: 117,488.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,693.90 : 133,040.85 = 78,325.90 : x
  2. Step 2: Convert to fraction form
    88,693.90/133,040.85 = 78,325.90/x
  3. Step 3: Cross multiply
    88,693.90x = 133,040.85 × 78,325.90
  4. Step 4: Simplify right side
    88,693.90x = 10,420,544,313.02
  5. Step 5: Solve for x
    x = 10,420,544,313.02/88,693.90
  6. Step 6: Final answer
    x = 117,488.85

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1.5x scale

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.