Home / 128,353.28-177,133.75-70,992.36

Finding the Fourth Proportional to 128,353.28, 177,133.75 and 70,992.36

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Solution

The fourth proportional to 128,353.28, 177,133.75 and 70,992.36 is: 97,972.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,353.28 : 177,133.75 = 70,992.36 : x
  2. Step 2: Convert to fraction form
    128,353.28/177,133.75 = 70,992.36/x
  3. Step 3: Cross multiply
    128,353.28x = 177,133.75 × 70,992.36
  4. Step 4: Simplify right side
    128,353.28x = 12,575,142,770.67
  5. Step 5: Solve for x
    x = 12,575,142,770.67/128,353.28
  6. Step 6: Final answer
    x = 97,972.90

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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.