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Finding the Fourth Proportional to 121,712.40, 182,568.60 and 42,915.60

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Solution

The fourth proportional to 121,712.40, 182,568.60 and 42,915.60 is: 64,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,712.40 : 182,568.60 = 42,915.60 : x
  2. Step 2: Convert to fraction form
    121,712.40/182,568.60 = 42,915.60/x
  3. Step 3: Cross multiply
    121,712.40x = 182,568.60 × 42,915.60
  4. Step 4: Simplify right side
    121,712.40x = 7,835,041,010.16
  5. Step 5: Solve for x
    x = 7,835,041,010.16/121,712.40
  6. Step 6: Final answer
    x = 64,373.40

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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.