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Finding the Fourth Proportional to 131,846.40, 197,866.80 and 87,458.40

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Solution

The fourth proportional to 131,846.40, 197,866.80 and 87,458.40 is: 131,252.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,846.40 : 197,866.80 = 87,458.40 : x
  2. Step 2: Convert to fraction form
    131,846.40/197,866.80 = 87,458.40/x
  3. Step 3: Cross multiply
    131,846.40x = 197,866.80 × 87,458.40
  4. Step 4: Simplify right side
    131,846.40x = 17,305,113,741.12
  5. Step 5: Solve for x
    x = 17,305,113,741.12/131,846.40
  6. Step 6: Final answer
    x = 131,252.08

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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.