Home / 125,136.48-172,691.13-71,420.41

Finding the Fourth Proportional to 125,136.48, 172,691.13 and 71,420.41

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Solution

The fourth proportional to 125,136.48, 172,691.13 and 71,420.41 is: 98,561.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,136.48 : 172,691.13 = 71,420.41 : x
  2. Step 2: Convert to fraction form
    125,136.48/172,691.13 = 71,420.41/x
  3. Step 3: Cross multiply
    125,136.48x = 172,691.13 × 71,420.41
  4. Step 4: Simplify right side
    125,136.48x = 12,333,671,307.96
  5. Step 5: Solve for x
    x = 12,333,671,307.96/125,136.48
  6. Step 6: Final answer
    x = 98,561.76

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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.