Home / 128,891,147.46-177,884,929.42-72,385,179.78

Finding the Fourth Proportional to 128,891,147.46, 177,884,929.42 and 72,385,179.78

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Solution

The fourth proportional to 128,891,147.46, 177,884,929.42 and 72,385,179.78 is: 99,900,054.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,891,147.46 : 177,884,929.42 = 72,385,179.78 : x
  2. Step 2: Convert to fraction form
    128,891,147.46/177,884,929.42 = 72,385,179.78/x
  3. Step 3: Cross multiply
    128,891,147.46x = 177,884,929.42 × 72,385,179.78
  4. Step 4: Simplify right side
    128,891,147.46x = 12,876,232,596,219,310
  5. Step 5: Solve for x
    x = 12,876,232,596,219,310/128,891,147.46
  6. Step 6: Final answer
    x = 99,900,054.04

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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.