Home / 90,764.19-136,045.40-68,505.39

Finding the Fourth Proportional to 90,764.19, 136,045.40 and 68,505.39

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Solution

The fourth proportional to 90,764.19, 136,045.40 and 68,505.39 is: 102,681.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,764.19 : 136,045.40 = 68,505.39 : x
  2. Step 2: Convert to fraction form
    90,764.19/136,045.40 = 68,505.39/x
  3. Step 3: Cross multiply
    90,764.19x = 136,045.40 × 68,505.39
  4. Step 4: Simplify right side
    90,764.19x = 9,319,842,842.18
  5. Step 5: Solve for x
    x = 9,319,842,842.18/90,764.19
  6. Step 6: Final answer
    x = 102,681.94

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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.