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Finding the Fourth Proportional to 141,870.80, 212,698.20 and 71,800.40

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Solution

The fourth proportional to 141,870.80, 212,698.20 and 71,800.40 is: 107,645.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,870.80 : 212,698.20 = 71,800.40 : x
  2. Step 2: Convert to fraction form
    141,870.80/212,698.20 = 71,800.40/x
  3. Step 3: Cross multiply
    141,870.80x = 212,698.20 × 71,800.40
  4. Step 4: Simplify right side
    141,870.80x = 15,271,815,839.28
  5. Step 5: Solve for x
    x = 15,271,815,839.28/141,870.80
  6. Step 6: Final answer
    x = 107,645.94

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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.