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Finding the Fourth Proportional to 155,901.11, 215,142.89 and 84,281.11

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Solution

The fourth proportional to 155,901.11, 215,142.89 and 84,281.11 is: 116,307.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,901.11 : 215,142.89 = 84,281.11 : x
  2. Step 2: Convert to fraction form
    155,901.11/215,142.89 = 84,281.11/x
  3. Step 3: Cross multiply
    155,901.11x = 215,142.89 × 84,281.11
  4. Step 4: Simplify right side
    155,901.11x = 18,132,480,618.55
  5. Step 5: Solve for x
    x = 18,132,480,618.55/155,901.11
  6. Step 6: Final answer
    x = 116,307.58

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1.5x scale

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.