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Finding the Fourth Proportional to 153,971.70, 230,957.55 and 131,421.30

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Solution

The fourth proportional to 153,971.70, 230,957.55 and 131,421.30 is: 197,131.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,971.70 : 230,957.55 = 131,421.30 : x
  2. Step 2: Convert to fraction form
    153,971.70/230,957.55 = 131,421.30/x
  3. Step 3: Cross multiply
    153,971.70x = 230,957.55 × 131,421.30
  4. Step 4: Simplify right side
    153,971.70x = 30,352,741,465.82
  5. Step 5: Solve for x
    x = 30,352,741,465.82/153,971.70
  6. Step 6: Final answer
    x = 197,131.95

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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.