Home / 91,385.16-137,079.62-28,205.32

Finding the Fourth Proportional to 91,385.16, 137,079.62 and 28,205.32

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Solution

The fourth proportional to 91,385.16, 137,079.62 and 28,205.32 is: 42,308.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,385.16 : 137,079.62 = 28,205.32 : x
  2. Step 2: Convert to fraction form
    91,385.16/137,079.62 = 28,205.32/x
  3. Step 3: Cross multiply
    91,385.16x = 137,079.62 × 28,205.32
  4. Step 4: Simplify right side
    91,385.16x = 3,866,374,547.58
  5. Step 5: Solve for x
    x = 3,866,374,547.58/91,385.16
  6. Step 6: Final answer
    x = 42,308.56

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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.