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Finding the Fourth Proportional to 124,053.59, 171,121.07 and 78,040.06

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Solution

The fourth proportional to 124,053.59, 171,121.07 and 78,040.06 is: 107,649.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,053.59 : 171,121.07 = 78,040.06 : x
  2. Step 2: Convert to fraction form
    124,053.59/171,121.07 = 78,040.06/x
  3. Step 3: Cross multiply
    124,053.59x = 171,121.07 × 78,040.06
  4. Step 4: Simplify right side
    124,053.59x = 13,354,298,337.36
  5. Step 5: Solve for x
    x = 13,354,298,337.36/124,053.59
  6. Step 6: Final answer
    x = 107,649.43

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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.