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Finding the Fourth Proportional to 136,967.45, 205,343.65 and 87,038.24

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Solution

The fourth proportional to 136,967.45, 205,343.65 and 87,038.24 is: 130,489.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,967.45 : 205,343.65 = 87,038.24 : x
  2. Step 2: Convert to fraction form
    136,967.45/205,343.65 = 87,038.24/x
  3. Step 3: Cross multiply
    136,967.45x = 205,343.65 × 87,038.24
  4. Step 4: Simplify right side
    136,967.45x = 17,872,749,455.98
  5. Step 5: Solve for x
    x = 17,872,749,455.98/136,967.45
  6. Step 6: Final answer
    x = 130,489.03

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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.