Home / 115,129.63-172,733.66-70,240.86

Finding the Fourth Proportional to 115,129.63, 172,733.66 and 70,240.86

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Solution

The fourth proportional to 115,129.63, 172,733.66 and 70,240.86 is: 105,385.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,129.63 : 172,733.66 = 70,240.86 : x
  2. Step 2: Convert to fraction form
    115,129.63/172,733.66 = 70,240.86/x
  3. Step 3: Cross multiply
    115,129.63x = 172,733.66 × 70,240.86
  4. Step 4: Simplify right side
    115,129.63x = 12,132,960,829.35
  5. Step 5: Solve for x
    x = 12,132,960,829.35/115,129.63
  6. Step 6: Final answer
    x = 105,385.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.