Home / 128,205,699.38-176,932,844.11-72,456,272.07

Finding the Fourth Proportional to 128,205,699.38, 176,932,844.11 and 72,456,272.07

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Solution

The fourth proportional to 128,205,699.38, 176,932,844.11 and 72,456,272.07 is: 99,994,729.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,205,699.38 : 176,932,844.11 = 72,456,272.07 : x
  2. Step 2: Convert to fraction form
    128,205,699.38/176,932,844.11 = 72,456,272.07/x
  3. Step 3: Cross multiply
    128,205,699.38x = 176,932,844.11 × 72,456,272.07
  4. Step 4: Simplify right side
    128,205,699.38x = 12,819,894,290,380,130
  5. Step 5: Solve for x
    x = 12,819,894,290,380,130/128,205,699.38
  6. Step 6: Final answer
    x = 99,994,729.97

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1.5x scale

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.