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Finding the Fourth Proportional to 86,690.86, 130,053.90 and 49,268.86

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Solution

The fourth proportional to 86,690.86, 130,053.90 and 49,268.86 is: 73,913.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,690.86 : 130,053.90 = 49,268.86 : x
  2. Step 2: Convert to fraction form
    86,690.86/130,053.90 = 49,268.86/x
  3. Step 3: Cross multiply
    86,690.86x = 130,053.90 × 49,268.86
  4. Step 4: Simplify right side
    86,690.86x = 6,407,607,391.55
  5. Step 5: Solve for x
    x = 6,407,607,391.55/86,690.86
  6. Step 6: Final answer
    x = 73,913.30

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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.