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Finding the Fourth Proportional to 104,281.60, 155,619.20 and 85,849.60

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Solution

The fourth proportional to 104,281.60, 155,619.20 and 85,849.60 is: 128,113.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,281.60 : 155,619.20 = 85,849.60 : x
  2. Step 2: Convert to fraction form
    104,281.60/155,619.20 = 85,849.60/x
  3. Step 3: Cross multiply
    104,281.60x = 155,619.20 × 85,849.60
  4. Step 4: Simplify right side
    104,281.60x = 13,359,846,072.32
  5. Step 5: Solve for x
    x = 13,359,846,072.32/104,281.60
  6. Step 6: Final answer
    x = 128,113.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.