Home / 85,211.20-127,816.80-53,718.40

Finding the Fourth Proportional to 85,211.20, 127,816.80 and 53,718.40

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Solution

The fourth proportional to 85,211.20, 127,816.80 and 53,718.40 is: 80,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,211.20 : 127,816.80 = 53,718.40 : x
  2. Step 2: Convert to fraction form
    85,211.20/127,816.80 = 53,718.40/x
  3. Step 3: Cross multiply
    85,211.20x = 127,816.80 × 53,718.40
  4. Step 4: Simplify right side
    85,211.20x = 6,866,113,989.12
  5. Step 5: Solve for x
    x = 6,866,113,989.12/85,211.20
  6. Step 6: Final answer
    x = 80,577.60

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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.