Home / 90,868.40-136,302.60-65,985.20

Finding the Fourth Proportional to 90,868.40, 136,302.60 and 65,985.20

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Solution

The fourth proportional to 90,868.40, 136,302.60 and 65,985.20 is: 98,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,868.40 : 136,302.60 = 65,985.20 : x
  2. Step 2: Convert to fraction form
    90,868.40/136,302.60 = 65,985.20/x
  3. Step 3: Cross multiply
    90,868.40x = 136,302.60 × 65,985.20
  4. Step 4: Simplify right side
    90,868.40x = 8,993,954,321.52
  5. Step 5: Solve for x
    x = 8,993,954,321.52/90,868.40
  6. Step 6: Final answer
    x = 98,977.80

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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.