Home / 129,428,173.20-193,890,317.40-78,157,894.80

Finding the Fourth Proportional to 129,428,173.20, 193,890,317.40 and 78,157,894.80

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Solution

The fourth proportional to 129,428,173.20, 193,890,317.40 and 78,157,894.80 is: 117,084,701.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,428,173.20 : 193,890,317.40 = 78,157,894.80 : x
  2. Step 2: Convert to fraction form
    129,428,173.20/193,890,317.40 = 78,157,894.80/x
  3. Step 3: Cross multiply
    129,428,173.20x = 193,890,317.40 × 78,157,894.80
  4. Step 4: Simplify right side
    129,428,173.20x = 15,154,059,030,087,810
  5. Step 5: Solve for x
    x = 15,154,059,030,087,810/129,428,173.20
  6. Step 6: Final answer
    x = 117,084,701.54

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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.