Home / 78,587.16-117,869.04-28,655.52

Finding the Fourth Proportional to 78,587.16, 117,869.04 and 28,655.52

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Solution

The fourth proportional to 78,587.16, 117,869.04 and 28,655.52 is: 42,979.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.16 : 117,869.04 = 28,655.52 : x
  2. Step 2: Convert to fraction form
    78,587.16/117,869.04 = 28,655.52/x
  3. Step 3: Cross multiply
    78,587.16x = 117,869.04 × 28,655.52
  4. Step 4: Simplify right side
    78,587.16x = 3,377,598,633.10
  5. Step 5: Solve for x
    x = 3,377,598,633.10/78,587.16
  6. Step 6: Final answer
    x = 42,979.01

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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.