Home / 78,700.40-118,062.21-28,095.50

Finding the Fourth Proportional to 78,700.40, 118,062.21 and 28,095.50

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Solution

The fourth proportional to 78,700.40, 118,062.21 and 28,095.50 is: 42,147.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,700.40 : 118,062.21 = 28,095.50 : x
  2. Step 2: Convert to fraction form
    78,700.40/118,062.21 = 28,095.50/x
  3. Step 3: Cross multiply
    78,700.40x = 118,062.21 × 28,095.50
  4. Step 4: Simplify right side
    78,700.40x = 3,317,016,821.06
  5. Step 5: Solve for x
    x = 3,317,016,821.06/78,700.40
  6. Step 6: Final answer
    x = 42,147.39

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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.