Home / 78,987.68-118,502.27-28,391.84

Finding the Fourth Proportional to 78,987.68, 118,502.27 and 28,391.84

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Solution

The fourth proportional to 78,987.68, 118,502.27 and 28,391.84 is: 42,595.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,987.68 : 118,502.27 = 28,391.84 : x
  2. Step 2: Convert to fraction form
    78,987.68/118,502.27 = 28,391.84/x
  3. Step 3: Cross multiply
    78,987.68x = 118,502.27 × 28,391.84
  4. Step 4: Simplify right side
    78,987.68x = 3,364,497,264.20
  5. Step 5: Solve for x
    x = 3,364,497,264.20/78,987.68
  6. Step 6: Final answer
    x = 42,595.22

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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.