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Finding the Fourth Proportional to 124,820.86, 172,239.50 and 73,835.52

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Solution

The fourth proportional to 124,820.86, 172,239.50 and 73,835.52 is: 101,885.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,820.86 : 172,239.50 = 73,835.52 : x
  2. Step 2: Convert to fraction form
    124,820.86/172,239.50 = 73,835.52/x
  3. Step 3: Cross multiply
    124,820.86x = 172,239.50 × 73,835.52
  4. Step 4: Simplify right side
    124,820.86x = 12,717,393,047.04
  5. Step 5: Solve for x
    x = 12,717,393,047.04/124,820.86
  6. Step 6: Final answer
    x = 101,885.16

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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.