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Finding the Fourth Proportional to 112,478,687.70, 168,718,031.55 and 39,694,890.30

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Solution

The fourth proportional to 112,478,687.70, 168,718,031.55 and 39,694,890.30 is: 59,542,335.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,478,687.70 : 168,718,031.55 = 39,694,890.30 : x
  2. Step 2: Convert to fraction form
    112,478,687.70/168,718,031.55 = 39,694,890.30/x
  3. Step 3: Cross multiply
    112,478,687.70x = 168,718,031.55 × 39,694,890.30
  4. Step 4: Simplify right side
    112,478,687.70x = 6,697,243,754,009,189
  5. Step 5: Solve for x
    x = 6,697,243,754,009,189/112,478,687.70
  6. Step 6: Final answer
    x = 59,542,335.45

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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.