Home / 65,720.20-98,580.30-40,788.40

Finding the Fourth Proportional to 65,720.20, 98,580.30 and 40,788.40

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Solution

The fourth proportional to 65,720.20, 98,580.30 and 40,788.40 is: 61,182.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.20 : 98,580.30 = 40,788.40 : x
  2. Step 2: Convert to fraction form
    65,720.20/98,580.30 = 40,788.40/x
  3. Step 3: Cross multiply
    65,720.20x = 98,580.30 × 40,788.40
  4. Step 4: Simplify right side
    65,720.20x = 4,020,932,708.52
  5. Step 5: Solve for x
    x = 4,020,932,708.52/65,720.20
  6. Step 6: Final answer
    x = 61,182.60

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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.