Home / 91,720.20-137,580.30-83,555.40

Finding the Fourth Proportional to 91,720.20, 137,580.30 and 83,555.40

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Solution

The fourth proportional to 91,720.20, 137,580.30 and 83,555.40 is: 125,333.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,720.20 : 137,580.30 = 83,555.40 : x
  2. Step 2: Convert to fraction form
    91,720.20/137,580.30 = 83,555.40/x
  3. Step 3: Cross multiply
    91,720.20x = 137,580.30 × 83,555.40
  4. Step 4: Simplify right side
    91,720.20x = 11,495,576,998.62
  5. Step 5: Solve for x
    x = 11,495,576,998.62/91,720.20
  6. Step 6: Final answer
    x = 125,333.10

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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.