Home / 129,030.40-193,545.60-76,412.80

Finding the Fourth Proportional to 129,030.40, 193,545.60 and 76,412.80

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Solution

The fourth proportional to 129,030.40, 193,545.60 and 76,412.80 is: 114,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,030.40 : 193,545.60 = 76,412.80 : x
  2. Step 2: Convert to fraction form
    129,030.40/193,545.60 = 76,412.80/x
  3. Step 3: Cross multiply
    129,030.40x = 193,545.60 × 76,412.80
  4. Step 4: Simplify right side
    129,030.40x = 14,789,361,223.68
  5. Step 5: Solve for x
    x = 14,789,361,223.68/129,030.40
  6. Step 6: Final answer
    x = 114,619.20

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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.