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Finding the Fourth Proportional to 235,979.30, 325,649.84 and 128,549.40

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Solution

The fourth proportional to 235,979.30, 325,649.84 and 128,549.40 is: 177,397.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,979.30 : 325,649.84 = 128,549.40 : x
  2. Step 2: Convert to fraction form
    235,979.30/325,649.84 = 128,549.40/x
  3. Step 3: Cross multiply
    235,979.30x = 325,649.84 × 128,549.40
  4. Step 4: Simplify right side
    235,979.30x = 41,862,090,899.35
  5. Step 5: Solve for x
    x = 41,862,090,899.35/235,979.30
  6. Step 6: Final answer
    x = 177,397.30

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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.