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Finding the Fourth Proportional to 68,117.79, 102,192.26 and 20,739.63

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Solution

The fourth proportional to 68,117.79, 102,192.26 and 20,739.63 is: 31,114.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,117.79 : 102,192.26 = 20,739.63 : x
  2. Step 2: Convert to fraction form
    68,117.79/102,192.26 = 20,739.63/x
  3. Step 3: Cross multiply
    68,117.79x = 102,192.26 × 20,739.63
  4. Step 4: Simplify right side
    68,117.79x = 2,119,429,557.57
  5. Step 5: Solve for x
    x = 2,119,429,557.57/68,117.79
  6. Step 6: Final answer
    x = 31,114.19

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1.5x scale

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.