Home / 128,891,143.22-177,884,923.55-72,385,175.52

Finding the Fourth Proportional to 128,891,143.22, 177,884,923.55 and 72,385,175.52

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Solution

The fourth proportional to 128,891,143.22, 177,884,923.55 and 72,385,175.52 is: 99,900,048.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,891,143.22 : 177,884,923.55 = 72,385,175.52 : x
  2. Step 2: Convert to fraction form
    128,891,143.22/177,884,923.55 = 72,385,175.52/x
  3. Step 3: Cross multiply
    128,891,143.22x = 177,884,923.55 × 72,385,175.52
  4. Step 4: Simplify right side
    128,891,143.22x = 12,876,231,413,166,604
  5. Step 5: Solve for x
    x = 12,876,231,413,166,604/128,891,143.22
  6. Step 6: Final answer
    x = 99,900,048.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.