Home / 89,620.20-134,430.30-85,683.60

Finding the Fourth Proportional to 89,620.20, 134,430.30 and 85,683.60

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Solution

The fourth proportional to 89,620.20, 134,430.30 and 85,683.60 is: 128,525.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,620.20 : 134,430.30 = 85,683.60 : x
  2. Step 2: Convert to fraction form
    89,620.20/134,430.30 = 85,683.60/x
  3. Step 3: Cross multiply
    89,620.20x = 134,430.30 × 85,683.60
  4. Step 4: Simplify right side
    89,620.20x = 11,518,472,053.08
  5. Step 5: Solve for x
    x = 11,518,472,053.08/89,620.20
  6. Step 6: Final answer
    x = 128,525.40

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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.