Home / 123,985.42-171,099.75-67,397.20

Finding the Fourth Proportional to 123,985.42, 171,099.75 and 67,397.20

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Solution

The fourth proportional to 123,985.42, 171,099.75 and 67,397.20 is: 93,008.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,985.42 : 171,099.75 = 67,397.20 : x
  2. Step 2: Convert to fraction form
    123,985.42/171,099.75 = 67,397.20/x
  3. Step 3: Cross multiply
    123,985.42x = 171,099.75 × 67,397.20
  4. Step 4: Simplify right side
    123,985.42x = 11,531,644,070.70
  5. Step 5: Solve for x
    x = 11,531,644,070.70/123,985.42
  6. Step 6: Final answer
    x = 93,008.07

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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.