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Finding the Fourth Proportional to 128,245.71, 192,368.57 and 34,751.46

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Solution

The fourth proportional to 128,245.71, 192,368.57 and 34,751.46 is: 52,127.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,245.71 : 192,368.57 = 34,751.46 : x
  2. Step 2: Convert to fraction form
    128,245.71/192,368.57 = 34,751.46/x
  3. Step 3: Cross multiply
    128,245.71x = 192,368.57 × 34,751.46
  4. Step 4: Simplify right side
    128,245.71x = 6,685,088,665.61
  5. Step 5: Solve for x
    x = 6,685,088,665.61/128,245.71
  6. Step 6: Final answer
    x = 52,127.19

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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.