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Finding the Fourth Proportional to 268,657.40, 402,525.30 and 128,113.40

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Solution

The fourth proportional to 268,657.40, 402,525.30 and 128,113.40 is: 191,950.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,657.40 : 402,525.30 = 128,113.40 : x
  2. Step 2: Convert to fraction form
    268,657.40/402,525.30 = 128,113.40/x
  3. Step 3: Cross multiply
    268,657.40x = 402,525.30 × 128,113.40
  4. Step 4: Simplify right side
    268,657.40x = 51,568,884,769.02
  5. Step 5: Solve for x
    x = 51,568,884,769.02/268,657.40
  6. Step 6: Final answer
    x = 191,950.36

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1.5x scale

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.