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Finding the Fourth Proportional to 78,300,261.88, 108,029,983.70 and 45,248,469.88

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Solution

The fourth proportional to 78,300,261.88, 108,029,983.70 and 45,248,469.88 is: 62,428,800.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,300,261.88 : 108,029,983.70 = 45,248,469.88 : x
  2. Step 2: Convert to fraction form
    78,300,261.88/108,029,983.70 = 45,248,469.88/x
  3. Step 3: Cross multiply
    78,300,261.88x = 108,029,983.70 × 45,248,469.88
  4. Step 4: Simplify right side
    78,300,261.88x = 4,888,191,463,586,341
  5. Step 5: Solve for x
    x = 4,888,191,463,586,341/78,300,261.88
  6. Step 6: Final answer
    x = 62,428,800.95

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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.