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Finding the Fourth Proportional to 207,148.35, 285,903.95 and 129,659.93

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Solution

The fourth proportional to 207,148.35, 285,903.95 and 129,659.93 is: 178,955.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,148.35 : 285,903.95 = 129,659.93 : x
  2. Step 2: Convert to fraction form
    207,148.35/285,903.95 = 129,659.93/x
  3. Step 3: Cross multiply
    207,148.35x = 285,903.95 × 129,659.93
  4. Step 4: Simplify right side
    207,148.35x = 37,070,286,143.72
  5. Step 5: Solve for x
    x = 37,070,286,143.72/207,148.35
  6. Step 6: Final answer
    x = 178,955.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.