Home / 71,608.32-98,821.35-39,780.18

Finding the Fourth Proportional to 71,608.32, 98,821.35 and 39,780.18

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Solution

The fourth proportional to 71,608.32, 98,821.35 and 39,780.18 is: 54,897.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,608.32 : 98,821.35 = 39,780.18 : x
  2. Step 2: Convert to fraction form
    71,608.32/98,821.35 = 39,780.18/x
  3. Step 3: Cross multiply
    71,608.32x = 98,821.35 × 39,780.18
  4. Step 4: Simplify right side
    71,608.32x = 3,931,131,090.84
  5. Step 5: Solve for x
    x = 3,931,131,090.84/71,608.32
  6. Step 6: Final answer
    x = 54,897.69

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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.