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Finding the Fourth Proportional to 155,870.11, 215,100.70 and 84,250.11

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Solution

The fourth proportional to 155,870.11, 215,100.70 and 84,250.11 is: 116,265.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,870.11 : 215,100.70 = 84,250.11 : x
  2. Step 2: Convert to fraction form
    155,870.11/215,100.70 = 84,250.11/x
  3. Step 3: Cross multiply
    155,870.11x = 215,100.70 × 84,250.11
  4. Step 4: Simplify right side
    155,870.11x = 18,122,257,636.08
  5. Step 5: Solve for x
    x = 18,122,257,636.08/155,870.11
  6. Step 6: Final answer
    x = 116,265.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.