Home / 78,686.10-118,043.55-31,943.70

Finding the Fourth Proportional to 78,686.10, 118,043.55 and 31,943.70

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Solution

The fourth proportional to 78,686.10, 118,043.55 and 31,943.70 is: 47,921.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,686.10 : 118,043.55 = 31,943.70 : x
  2. Step 2: Convert to fraction form
    78,686.10/118,043.55 = 31,943.70/x
  3. Step 3: Cross multiply
    78,686.10x = 118,043.55 × 31,943.70
  4. Step 4: Simplify right side
    78,686.10x = 3,770,747,748.14
  5. Step 5: Solve for x
    x = 3,770,747,748.14/78,686.10
  6. Step 6: Final answer
    x = 47,921.40

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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.