Home / 128,894,934.40-193,342,401.60-77,934,140.80

Finding the Fourth Proportional to 128,894,934.40, 193,342,401.60 and 77,934,140.80

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Solution

The fourth proportional to 128,894,934.40, 193,342,401.60 and 77,934,140.80 is: 116,901,211.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,894,934.40 : 193,342,401.60 = 77,934,140.80 : x
  2. Step 2: Convert to fraction form
    128,894,934.40/193,342,401.60 = 77,934,140.80/x
  3. Step 3: Cross multiply
    128,894,934.40x = 193,342,401.60 × 77,934,140.80
  4. Step 4: Simplify right side
    128,894,934.40x = 15,067,973,948,904,544
  5. Step 5: Solve for x
    x = 15,067,973,948,904,544/128,894,934.40
  6. Step 6: Final answer
    x = 116,901,211.20

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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.