Home / 78,894,010.80-118,341,016.20-21,386,189.70

Finding the Fourth Proportional to 78,894,010.80, 118,341,016.20 and 21,386,189.70

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Solution

The fourth proportional to 78,894,010.80, 118,341,016.20 and 21,386,189.70 is: 32,079,284.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,894,010.80 : 118,341,016.20 = 21,386,189.70 : x
  2. Step 2: Convert to fraction form
    78,894,010.80/118,341,016.20 = 21,386,189.70/x
  3. Step 3: Cross multiply
    78,894,010.80x = 118,341,016.20 × 21,386,189.70
  4. Step 4: Simplify right side
    78,894,010.80x = 2,530,863,421,743,973
  5. Step 5: Solve for x
    x = 2,530,863,421,743,973/78,894,010.80
  6. Step 6: Final answer
    x = 32,079,284.55

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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.