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Finding the Fourth Proportional to 136,987.58, 205,483.80 and 52,739.48

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Solution

The fourth proportional to 136,987.58, 205,483.80 and 52,739.48 is: 79,110.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,987.58 : 205,483.80 = 52,739.48 : x
  2. Step 2: Convert to fraction form
    136,987.58/205,483.80 = 52,739.48/x
  3. Step 3: Cross multiply
    136,987.58x = 205,483.80 × 52,739.48
  4. Step 4: Simplify right side
    136,987.58x = 10,837,108,760.42
  5. Step 5: Solve for x
    x = 10,837,108,760.42/136,987.58
  6. Step 6: Final answer
    x = 79,110.16

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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.