Home / 81,002.40-121,503.60-51,259.20

Finding the Fourth Proportional to 81,002.40, 121,503.60 and 51,259.20

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Solution

The fourth proportional to 81,002.40, 121,503.60 and 51,259.20 is: 76,888.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.40 : 121,503.60 = 51,259.20 : x
  2. Step 2: Convert to fraction form
    81,002.40/121,503.60 = 51,259.20/x
  3. Step 3: Cross multiply
    81,002.40x = 121,503.60 × 51,259.20
  4. Step 4: Simplify right side
    81,002.40x = 6,228,177,333.12
  5. Step 5: Solve for x
    x = 6,228,177,333.12/81,002.40
  6. Step 6: Final answer
    x = 76,888.80

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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.