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Finding the Fourth Proportional to 86,762.40, 130,078.80 and 36,801.60

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Solution

The fourth proportional to 86,762.40, 130,078.80 and 36,801.60 is: 55,174.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,762.40 : 130,078.80 = 36,801.60 : x
  2. Step 2: Convert to fraction form
    86,762.40/130,078.80 = 36,801.60/x
  3. Step 3: Cross multiply
    86,762.40x = 130,078.80 × 36,801.60
  4. Step 4: Simplify right side
    86,762.40x = 4,787,107,966.08
  5. Step 5: Solve for x
    x = 4,787,107,966.08/86,762.40
  6. Step 6: Final answer
    x = 55,174.91

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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.