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Finding the Fourth Proportional to 77,668,747.90, 107,185,446.52 and 42,388,484.90

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Solution

The fourth proportional to 77,668,747.90, 107,185,446.52 and 42,388,484.90 is: 58,497,514.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,668,747.90 : 107,185,446.52 = 42,388,484.90 : x
  2. Step 2: Convert to fraction form
    77,668,747.90/107,185,446.52 = 42,388,484.90/x
  3. Step 3: Cross multiply
    77,668,747.90x = 107,185,446.52 × 42,388,484.90
  4. Step 4: Simplify right side
    77,668,747.90x = 4,543,428,680,670,879
  5. Step 5: Solve for x
    x = 4,543,428,680,670,879/77,668,747.90
  6. Step 6: Final answer
    x = 58,497,514.17

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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.