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Finding the Fourth Proportional to 86,937.80, 130,425.60 and 49,515.80

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Solution

The fourth proportional to 86,937.80, 130,425.60 and 49,515.80 is: 74,284.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,937.80 : 130,425.60 = 49,515.80 : x
  2. Step 2: Convert to fraction form
    86,937.80/130,425.60 = 49,515.80/x
  3. Step 3: Cross multiply
    86,937.80x = 130,425.60 × 49,515.80
  4. Step 4: Simplify right side
    86,937.80x = 6,458,127,924.48
  5. Step 5: Solve for x
    x = 6,458,127,924.48/86,937.80
  6. Step 6: Final answer
    x = 74,284.46

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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.