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Finding the Fourth Proportional to 145,987.60, 218,981.40 and 131,472.40

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Solution

The fourth proportional to 145,987.60, 218,981.40 and 131,472.40 is: 197,208.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,987.60 : 218,981.40 = 131,472.40 : x
  2. Step 2: Convert to fraction form
    145,987.60/218,981.40 = 131,472.40/x
  3. Step 3: Cross multiply
    145,987.60x = 218,981.40 × 131,472.40
  4. Step 4: Simplify right side
    145,987.60x = 28,790,010,213.36
  5. Step 5: Solve for x
    x = 28,790,010,213.36/145,987.60
  6. Step 6: Final answer
    x = 197,208.60

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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.