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Finding the Fourth Proportional to 100,841.70, 151,262.55 and 86,844.90

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Solution

The fourth proportional to 100,841.70, 151,262.55 and 86,844.90 is: 130,267.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,841.70 : 151,262.55 = 86,844.90 : x
  2. Step 2: Convert to fraction form
    100,841.70/151,262.55 = 86,844.90/x
  3. Step 3: Cross multiply
    100,841.70x = 151,262.55 × 86,844.90
  4. Step 4: Simplify right side
    100,841.70x = 13,136,381,028.50
  5. Step 5: Solve for x
    x = 13,136,381,028.50/100,841.70
  6. Step 6: Final answer
    x = 130,267.35

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1.5x scale

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.