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Finding the Fourth Proportional to 71,119,991.60, 106,679,987.40 and 69,986,250.80

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Solution

The fourth proportional to 71,119,991.60, 106,679,987.40 and 69,986,250.80 is: 104,979,376.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,119,991.60 : 106,679,987.40 = 69,986,250.80 : x
  2. Step 2: Convert to fraction form
    71,119,991.60/106,679,987.40 = 69,986,250.80/x
  3. Step 3: Cross multiply
    71,119,991.60x = 106,679,987.40 × 69,986,250.80
  4. Step 4: Simplify right side
    71,119,991.60x = 7,466,132,353,517,240
  5. Step 5: Solve for x
    x = 7,466,132,353,517,240/71,119,991.60
  6. Step 6: Final answer
    x = 104,979,376.20

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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.