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Finding the Fourth Proportional to 121,417.60, 182,126.40 and 79,427.20

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Solution

The fourth proportional to 121,417.60, 182,126.40 and 79,427.20 is: 119,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,417.60 : 182,126.40 = 79,427.20 : x
  2. Step 2: Convert to fraction form
    121,417.60/182,126.40 = 79,427.20/x
  3. Step 3: Cross multiply
    121,417.60x = 182,126.40 × 79,427.20
  4. Step 4: Simplify right side
    121,417.60x = 14,465,789,998.08
  5. Step 5: Solve for x
    x = 14,465,789,998.08/121,417.60
  6. Step 6: Final answer
    x = 119,140.80

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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.