Home / 65,459.19-90,331.32-40,008.15

Finding the Fourth Proportional to 65,459.19, 90,331.32 and 40,008.15

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Solution

The fourth proportional to 65,459.19, 90,331.32 and 40,008.15 is: 55,209.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,459.19 : 90,331.32 = 40,008.15 : x
  2. Step 2: Convert to fraction form
    65,459.19/90,331.32 = 40,008.15/x
  3. Step 3: Cross multiply
    65,459.19x = 90,331.32 × 40,008.15
  4. Step 4: Simplify right side
    65,459.19x = 3,613,989,000.26
  5. Step 5: Solve for x
    x = 3,613,989,000.26/65,459.19
  6. Step 6: Final answer
    x = 55,209.80

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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.