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Finding the Fourth Proportional to 99,857,345.80, 149,786,018.70 and 61,394,139.40

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Solution

The fourth proportional to 99,857,345.80, 149,786,018.70 and 61,394,139.40 is: 92,091,209.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,857,345.80 : 149,786,018.70 = 61,394,139.40 : x
  2. Step 2: Convert to fraction form
    99,857,345.80/149,786,018.70 = 61,394,139.40/x
  3. Step 3: Cross multiply
    99,857,345.80x = 149,786,018.70 × 61,394,139.40
  4. Step 4: Simplify right side
    99,857,345.80x = 9,195,983,712,238,806
  5. Step 5: Solve for x
    x = 9,195,983,712,238,806/99,857,345.80
  6. Step 6: Final answer
    x = 92,091,209.10

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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.