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Finding the Fourth Proportional to 128,385.84, 192,564.18 and 34,869.72

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Solution

The fourth proportional to 128,385.84, 192,564.18 and 34,869.72 is: 52,300.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,385.84 : 192,564.18 = 34,869.72 : x
  2. Step 2: Convert to fraction form
    128,385.84/192,564.18 = 34,869.72/x
  3. Step 3: Cross multiply
    128,385.84x = 192,564.18 × 34,869.72
  4. Step 4: Simplify right side
    128,385.84x = 6,714,659,038.63
  5. Step 5: Solve for x
    x = 6,714,659,038.63/128,385.84
  6. Step 6: Final answer
    x = 52,300.62

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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.