Home / 90,830.70-136,116.45-66,951.90

Finding the Fourth Proportional to 90,830.70, 136,116.45 and 66,951.90

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Solution

The fourth proportional to 90,830.70, 136,116.45 and 66,951.90 is: 100,332.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,830.70 : 136,116.45 = 66,951.90 : x
  2. Step 2: Convert to fraction form
    90,830.70/136,116.45 = 66,951.90/x
  3. Step 3: Cross multiply
    90,830.70x = 136,116.45 × 66,951.90
  4. Step 4: Simplify right side
    90,830.70x = 9,113,254,948.76
  5. Step 5: Solve for x
    x = 9,113,254,948.76/90,830.70
  6. Step 6: Final answer
    x = 100,332.32

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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.