Home / 141,985.20-212,718.60-86,516.40

Finding the Fourth Proportional to 141,985.20, 212,718.60 and 86,516.40

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Solution

The fourth proportional to 141,985.20, 212,718.60 and 86,516.40 is: 129,616.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,985.20 : 212,718.60 = 86,516.40 : x
  2. Step 2: Convert to fraction form
    141,985.20/212,718.60 = 86,516.40/x
  3. Step 3: Cross multiply
    141,985.20x = 212,718.60 × 86,516.40
  4. Step 4: Simplify right side
    141,985.20x = 18,403,647,485.04
  5. Step 5: Solve for x
    x = 18,403,647,485.04/141,985.20
  6. Step 6: Final answer
    x = 129,616.66

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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.