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Finding the Fourth Proportional to 216,955.72, 299,434.35 and 129,734.92

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Solution

The fourth proportional to 216,955.72, 299,434.35 and 129,734.92 is: 179,055.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,955.72 : 299,434.35 = 129,734.92 : x
  2. Step 2: Convert to fraction form
    216,955.72/299,434.35 = 129,734.92/x
  3. Step 3: Cross multiply
    216,955.72x = 299,434.35 × 129,734.92
  4. Step 4: Simplify right side
    216,955.72x = 38,847,091,442.50
  5. Step 5: Solve for x
    x = 38,847,091,442.50/216,955.72
  6. Step 6: Final answer
    x = 179,055.39

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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.