Home / 71,615.08-98,820.90-39,776.68

Finding the Fourth Proportional to 71,615.08, 98,820.90 and 39,776.68

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Solution

The fourth proportional to 71,615.08, 98,820.90 and 39,776.68 is: 54,887.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,615.08 : 98,820.90 = 39,776.68 : x
  2. Step 2: Convert to fraction form
    71,615.08/98,820.90 = 39,776.68/x
  3. Step 3: Cross multiply
    71,615.08x = 98,820.90 × 39,776.68
  4. Step 4: Simplify right side
    71,615.08x = 3,930,767,316.61
  5. Step 5: Solve for x
    x = 3,930,767,316.61/71,615.08
  6. Step 6: Final answer
    x = 54,887.42

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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.