Home / 128,023.20-191,775.60-72,554.40

Finding the Fourth Proportional to 128,023.20, 191,775.60 and 72,554.40

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Solution

The fourth proportional to 128,023.20, 191,775.60 and 72,554.40 is: 108,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,023.20 : 191,775.60 = 72,554.40 : x
  2. Step 2: Convert to fraction form
    128,023.20/191,775.60 = 72,554.40/x
  3. Step 3: Cross multiply
    128,023.20x = 191,775.60 × 72,554.40
  4. Step 4: Simplify right side
    128,023.20x = 13,914,163,592.64
  5. Step 5: Solve for x
    x = 13,914,163,592.64/128,023.20
  6. Step 6: Final answer
    x = 108,684.70

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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.