Home / 85,406.13-117,915.89-76,438.08

Finding the Fourth Proportional to 85,406.13, 117,915.89 and 76,438.08

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Solution

The fourth proportional to 85,406.13, 117,915.89 and 76,438.08 is: 105,534.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.13 : 117,915.89 = 76,438.08 : x
  2. Step 2: Convert to fraction form
    85,406.13/117,915.89 = 76,438.08/x
  3. Step 3: Cross multiply
    85,406.13x = 117,915.89 × 76,438.08
  4. Step 4: Simplify right side
    85,406.13x = 9,013,263,850.90
  5. Step 5: Solve for x
    x = 9,013,263,850.90/85,406.13
  6. Step 6: Final answer
    x = 105,534.16

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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.