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Finding the Fourth Proportional to 121,812.60, 182,718.90 and 42,934.80

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Solution

The fourth proportional to 121,812.60, 182,718.90 and 42,934.80 is: 64,402.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,812.60 : 182,718.90 = 42,934.80 : x
  2. Step 2: Convert to fraction form
    121,812.60/182,718.90 = 42,934.80/x
  3. Step 3: Cross multiply
    121,812.60x = 182,718.90 × 42,934.80
  4. Step 4: Simplify right side
    121,812.60x = 7,844,999,427.72
  5. Step 5: Solve for x
    x = 7,844,999,427.72/121,812.60
  6. Step 6: Final answer
    x = 64,402.20

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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.