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Finding the Fourth Proportional to 82,938.40, 124,407.60 and 30,385.60

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Solution

The fourth proportional to 82,938.40, 124,407.60 and 30,385.60 is: 45,578.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,938.40 : 124,407.60 = 30,385.60 : x
  2. Step 2: Convert to fraction form
    82,938.40/124,407.60 = 30,385.60/x
  3. Step 3: Cross multiply
    82,938.40x = 124,407.60 × 30,385.60
  4. Step 4: Simplify right side
    82,938.40x = 3,780,199,570.56
  5. Step 5: Solve for x
    x = 3,780,199,570.56/82,938.40
  6. Step 6: Final answer
    x = 45,578.40

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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.