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Finding the Fourth Proportional to 105,886,687.80, 158,830,031.70 and 69,606,982.20

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Solution

The fourth proportional to 105,886,687.80, 158,830,031.70 and 69,606,982.20 is: 104,410,473.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,886,687.80 : 158,830,031.70 = 69,606,982.20 : x
  2. Step 2: Convert to fraction form
    105,886,687.80/158,830,031.70 = 69,606,982.20/x
  3. Step 3: Cross multiply
    105,886,687.80x = 158,830,031.70 × 69,606,982.20
  4. Step 4: Simplify right side
    105,886,687.80x = 11,055,679,189,367,336
  5. Step 5: Solve for x
    x = 11,055,679,189,367,336/105,886,687.80
  6. Step 6: Final answer
    x = 104,410,473.30

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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.