Home / 97,645.40-146,781.30-90,711.80

Finding the Fourth Proportional to 97,645.40, 146,781.30 and 90,711.80

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Solution

The fourth proportional to 97,645.40, 146,781.30 and 90,711.80 is: 136,358.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,645.40 : 146,781.30 = 90,711.80 : x
  2. Step 2: Convert to fraction form
    97,645.40/146,781.30 = 90,711.80/x
  3. Step 3: Cross multiply
    97,645.40x = 146,781.30 × 90,711.80
  4. Step 4: Simplify right side
    97,645.40x = 13,314,795,929.34
  5. Step 5: Solve for x
    x = 13,314,795,929.34/97,645.40
  6. Step 6: Final answer
    x = 136,358.66

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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.