Home / 78,387.48-117,550.44-28,459.08

Finding the Fourth Proportional to 78,387.48, 117,550.44 and 28,459.08

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Solution

The fourth proportional to 78,387.48, 117,550.44 and 28,459.08 is: 42,677.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,387.48 : 117,550.44 = 28,459.08 : x
  2. Step 2: Convert to fraction form
    78,387.48/117,550.44 = 28,459.08/x
  3. Step 3: Cross multiply
    78,387.48x = 117,550.44 × 28,459.08
  4. Step 4: Simplify right side
    78,387.48x = 3,345,377,376.00
  5. Step 5: Solve for x
    x = 3,345,377,376.00/78,387.48
  6. Step 6: Final answer
    x = 42,677.45

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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.