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Finding the Fourth Proportional to 135,706.61, 203,878.02 and 128,038.04

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Solution

The fourth proportional to 135,706.61, 203,878.02 and 128,038.04 is: 192,357.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,706.61 : 203,878.02 = 128,038.04 : x
  2. Step 2: Convert to fraction form
    135,706.61/203,878.02 = 128,038.04/x
  3. Step 3: Cross multiply
    135,706.61x = 203,878.02 × 128,038.04
  4. Step 4: Simplify right side
    135,706.61x = 26,104,141,060.49
  5. Step 5: Solve for x
    x = 26,104,141,060.49/135,706.61
  6. Step 6: Final answer
    x = 192,357.19

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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.