Home / 86,025,205.20-129,037,807.80-85,428,008.40

Finding the Fourth Proportional to 86,025,205.20, 129,037,807.80 and 85,428,008.40

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Solution

The fourth proportional to 86,025,205.20, 129,037,807.80 and 85,428,008.40 is: 128,142,012.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,025,205.20 : 129,037,807.80 = 85,428,008.40 : x
  2. Step 2: Convert to fraction form
    86,025,205.20/129,037,807.80 = 85,428,008.40/x
  3. Step 3: Cross multiply
    86,025,205.20x = 129,037,807.80 × 85,428,008.40
  4. Step 4: Simplify right side
    86,025,205.20x = 11,023,442,928,655,986
  5. Step 5: Solve for x
    x = 11,023,442,928,655,986/86,025,205.20
  6. Step 6: Final answer
    x = 128,142,012.60

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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.