Home / 90,702.35-125,125.70-78,105.23

Finding the Fourth Proportional to 90,702.35, 125,125.70 and 78,105.23

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Solution

The fourth proportional to 90,702.35, 125,125.70 and 78,105.23 is: 107,747.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,702.35 : 125,125.70 = 78,105.23 : x
  2. Step 2: Convert to fraction form
    90,702.35/125,125.70 = 78,105.23/x
  3. Step 3: Cross multiply
    90,702.35x = 125,125.70 × 78,105.23
  4. Step 4: Simplify right side
    90,702.35x = 9,772,972,320.10
  5. Step 5: Solve for x
    x = 9,772,972,320.10/90,702.35
  6. Step 6: Final answer
    x = 107,747.72

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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.