Home / 90,777.60-125,015.04-65,587.20

Finding the Fourth Proportional to 90,777.60, 125,015.04 and 65,587.20

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Solution

The fourth proportional to 90,777.60, 125,015.04 and 65,587.20 is: 90,323.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,777.60 : 125,015.04 = 65,587.20 : x
  2. Step 2: Convert to fraction form
    90,777.60/125,015.04 = 65,587.20/x
  3. Step 3: Cross multiply
    90,777.60x = 125,015.04 × 65,587.20
  4. Step 4: Simplify right side
    90,777.60x = 8,199,386,431.49
  5. Step 5: Solve for x
    x = 8,199,386,431.49/90,777.60
  6. Step 6: Final answer
    x = 90,323.90

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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.