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Finding the Fourth Proportional to 85,334.80, 128,002.20 and 83,952.40

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Solution

The fourth proportional to 85,334.80, 128,002.20 and 83,952.40 is: 125,928.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,334.80 : 128,002.20 = 83,952.40 : x
  2. Step 2: Convert to fraction form
    85,334.80/128,002.20 = 83,952.40/x
  3. Step 3: Cross multiply
    85,334.80x = 128,002.20 × 83,952.40
  4. Step 4: Simplify right side
    85,334.80x = 10,746,091,895.28
  5. Step 5: Solve for x
    x = 10,746,091,895.28/85,334.80
  6. Step 6: Final answer
    x = 125,928.60

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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.