Home / 102,815.60-154,223.40-85,319.60

Finding the Fourth Proportional to 102,815.60, 154,223.40 and 85,319.60

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Solution

The fourth proportional to 102,815.60, 154,223.40 and 85,319.60 is: 127,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,815.60 : 154,223.40 = 85,319.60 : x
  2. Step 2: Convert to fraction form
    102,815.60/154,223.40 = 85,319.60/x
  3. Step 3: Cross multiply
    102,815.60x = 154,223.40 × 85,319.60
  4. Step 4: Simplify right side
    102,815.60x = 13,158,278,798.64
  5. Step 5: Solve for x
    x = 13,158,278,798.64/102,815.60
  6. Step 6: Final answer
    x = 127,979.40

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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.