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Finding the Fourth Proportional to 121,283.60, 182,011.80 and 51,213.20

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Solution

The fourth proportional to 121,283.60, 182,011.80 and 51,213.20 is: 76,856.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,283.60 : 182,011.80 = 51,213.20 : x
  2. Step 2: Convert to fraction form
    121,283.60/182,011.80 = 51,213.20/x
  3. Step 3: Cross multiply
    121,283.60x = 182,011.80 × 51,213.20
  4. Step 4: Simplify right side
    121,283.60x = 9,321,406,715.76
  5. Step 5: Solve for x
    x = 9,321,406,715.76/121,283.60
  6. Step 6: Final answer
    x = 76,856.28

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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.