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Finding the Fourth Proportional to 62,290, 85,971.92 and 39,017.20

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Solution

The fourth proportional to 62,290, 85,971.92 and 39,017.20 is: 53,851.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,290 : 85,971.92 = 39,017.20 : x
  2. Step 2: Convert to fraction form
    62,290/85,971.92 = 39,017.20/x
  3. Step 3: Cross multiply
    62,290x = 85,971.92 × 39,017.20
  4. Step 4: Simplify right side
    62,290x = 3,354,383,597.02
  5. Step 5: Solve for x
    x = 3,354,383,597.02/62,290
  6. Step 6: Final answer
    x = 53,851.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.