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Finding the Fourth Proportional to 235,886.70, 325,524 and 128,457.18

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Solution

The fourth proportional to 235,886.70, 325,524 and 128,457.18 is: 177,271.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,886.70 : 325,524 = 128,457.18 : x
  2. Step 2: Convert to fraction form
    235,886.70/325,524 = 128,457.18/x
  3. Step 3: Cross multiply
    235,886.70x = 325,524 × 128,457.18
  4. Step 4: Simplify right side
    235,886.70x = 41,815,895,062.32
  5. Step 5: Solve for x
    x = 41,815,895,062.32/235,886.70
  6. Step 6: Final answer
    x = 177,271.10

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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.