Home / 86,646.20-129,969.30-47,280.20

Finding the Fourth Proportional to 86,646.20, 129,969.30 and 47,280.20

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Solution

The fourth proportional to 86,646.20, 129,969.30 and 47,280.20 is: 70,920.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,646.20 : 129,969.30 = 47,280.20 : x
  2. Step 2: Convert to fraction form
    86,646.20/129,969.30 = 47,280.20/x
  3. Step 3: Cross multiply
    86,646.20x = 129,969.30 × 47,280.20
  4. Step 4: Simplify right side
    86,646.20x = 6,144,974,497.86
  5. Step 5: Solve for x
    x = 6,144,974,497.86/86,646.20
  6. Step 6: Final answer
    x = 70,920.30

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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.