Home / 87,189.47-120,307.12-51,374.61

Finding the Fourth Proportional to 87,189.47, 120,307.12 and 51,374.61

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Solution

The fourth proportional to 87,189.47, 120,307.12 and 51,374.61 is: 70,888.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,189.47 : 120,307.12 = 51,374.61 : x
  2. Step 2: Convert to fraction form
    87,189.47/120,307.12 = 51,374.61/x
  3. Step 3: Cross multiply
    87,189.47x = 120,307.12 × 51,374.61
  4. Step 4: Simplify right side
    87,189.47x = 6,180,731,370.22
  5. Step 5: Solve for x
    x = 6,180,731,370.22/87,189.47
  6. Step 6: Final answer
    x = 70,888.51

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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.