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Finding the Fourth Proportional to 136,812.60, 205,109.55 and 57,861.90

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Solution

The fourth proportional to 136,812.60, 205,109.55 and 57,861.90 is: 86,746.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,812.60 : 205,109.55 = 57,861.90 : x
  2. Step 2: Convert to fraction form
    136,812.60/205,109.55 = 57,861.90/x
  3. Step 3: Cross multiply
    136,812.60x = 205,109.55 × 57,861.90
  4. Step 4: Simplify right side
    136,812.60x = 11,868,028,271.15
  5. Step 5: Solve for x
    x = 11,868,028,271.15/136,812.60
  6. Step 6: Final answer
    x = 86,746.60

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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.