Home / 108,619.40-162,929.10-78,897.80

Finding the Fourth Proportional to 108,619.40, 162,929.10 and 78,897.80

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Solution

The fourth proportional to 108,619.40, 162,929.10 and 78,897.80 is: 118,346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,619.40 : 162,929.10 = 78,897.80 : x
  2. Step 2: Convert to fraction form
    108,619.40/162,929.10 = 78,897.80/x
  3. Step 3: Cross multiply
    108,619.40x = 162,929.10 × 78,897.80
  4. Step 4: Simplify right side
    108,619.40x = 12,854,747,545.98
  5. Step 5: Solve for x
    x = 12,854,747,545.98/108,619.40
  6. Step 6: Final answer
    x = 118,346.70

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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.