Home / 103,322.12-142,221.82-90,545.20

Finding the Fourth Proportional to 103,322.12, 142,221.82 and 90,545.20

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Solution

The fourth proportional to 103,322.12, 142,221.82 and 90,545.20 is: 124,634.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,322.12 : 142,221.82 = 90,545.20 : x
  2. Step 2: Convert to fraction form
    103,322.12/142,221.82 = 90,545.20/x
  3. Step 3: Cross multiply
    103,322.12x = 142,221.82 × 90,545.20
  4. Step 4: Simplify right side
    103,322.12x = 12,877,503,136.26
  5. Step 5: Solve for x
    x = 12,877,503,136.26/103,322.12
  6. Step 6: Final answer
    x = 124,634.52

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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.