Home / 78,830.10-118,245.15-49,281.30

Finding the Fourth Proportional to 78,830.10, 118,245.15 and 49,281.30

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Solution

The fourth proportional to 78,830.10, 118,245.15 and 49,281.30 is: 73,921.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,830.10 : 118,245.15 = 49,281.30 : x
  2. Step 2: Convert to fraction form
    78,830.10/118,245.15 = 49,281.30/x
  3. Step 3: Cross multiply
    78,830.10x = 118,245.15 × 49,281.30
  4. Step 4: Simplify right side
    78,830.10x = 5,827,274,710.70
  5. Step 5: Solve for x
    x = 5,827,274,710.70/78,830.10
  6. Step 6: Final answer
    x = 73,921.95

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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.