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Finding the Fourth Proportional to 131,430.40, 197,242.80 and 87,042.40

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Solution

The fourth proportional to 131,430.40, 197,242.80 and 87,042.40 is: 130,627.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,430.40 : 197,242.80 = 87,042.40 : x
  2. Step 2: Convert to fraction form
    131,430.40/197,242.80 = 87,042.40/x
  3. Step 3: Cross multiply
    131,430.40x = 197,242.80 × 87,042.40
  4. Step 4: Simplify right side
    131,430.40x = 17,168,486,694.72
  5. Step 5: Solve for x
    x = 17,168,486,694.72/131,430.40
  6. Step 6: Final answer
    x = 130,627.97

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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.