Home / 128,405,442.13-192,567,703.62-42,123,743.17

Finding the Fourth Proportional to 128,405,442.13, 192,567,703.62 and 42,123,743.17

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Solution

The fourth proportional to 128,405,442.13, 192,567,703.62 and 42,123,743.17 is: 63,172,341.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,405,442.13 : 192,567,703.62 = 42,123,743.17 : x
  2. Step 2: Convert to fraction form
    128,405,442.13/192,567,703.62 = 42,123,743.17/x
  3. Step 3: Cross multiply
    128,405,442.13x = 192,567,703.62 × 42,123,743.17
  4. Step 4: Simplify right side
    128,405,442.13x = 8,111,672,489,162,721
  5. Step 5: Solve for x
    x = 8,111,672,489,162,721/128,405,442.13
  6. Step 6: Final answer
    x = 63,172,341.88

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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.