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Finding the Fourth Proportional to 124,939, 172,415.76 and 68,350.40

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Solution

The fourth proportional to 124,939, 172,415.76 and 68,350.40 is: 94,323.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,939 : 172,415.76 = 68,350.40 : x
  2. Step 2: Convert to fraction form
    124,939/172,415.76 = 68,350.40/x
  3. Step 3: Cross multiply
    124,939x = 172,415.76 × 68,350.40
  4. Step 4: Simplify right side
    124,939x = 11,784,686,162.30
  5. Step 5: Solve for x
    x = 11,784,686,162.30/124,939
  6. Step 6: Final answer
    x = 94,323.52

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1.5x scale

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.