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Finding the Fourth Proportional to 77,668,627.73, 107,184,978.63 and 42,388,695.66

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Solution

The fourth proportional to 77,668,627.73, 107,184,978.63 and 42,388,695.66 is: 58,497,640.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,668,627.73 : 107,184,978.63 = 42,388,695.66 : x
  2. Step 2: Convert to fraction form
    77,668,627.73/107,184,978.63 = 42,388,695.66/x
  3. Step 3: Cross multiply
    77,668,627.73x = 107,184,978.63 × 42,388,695.66
  4. Step 4: Simplify right side
    77,668,627.73x = 4,543,431,438,470,673
  5. Step 5: Solve for x
    x = 4,543,431,438,470,673/77,668,627.73
  6. Step 6: Final answer
    x = 58,497,640.18

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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.