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Finding the Fourth Proportional to 121,411.60, 182,117.40 and 74,690.80

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Solution

The fourth proportional to 121,411.60, 182,117.40 and 74,690.80 is: 112,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,411.60 : 182,117.40 = 74,690.80 : x
  2. Step 2: Convert to fraction form
    121,411.60/182,117.40 = 74,690.80/x
  3. Step 3: Cross multiply
    121,411.60x = 182,117.40 × 74,690.80
  4. Step 4: Simplify right side
    121,411.60x = 13,602,494,299.92
  5. Step 5: Solve for x
    x = 13,602,494,299.92/121,411.60
  6. Step 6: Final answer
    x = 112,036.20

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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.