Home / 128,749.50-177,659.91-72,152.70

Finding the Fourth Proportional to 128,749.50, 177,659.91 and 72,152.70

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Solution

The fourth proportional to 128,749.50, 177,659.91 and 72,152.70 is: 99,562.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,749.50 : 177,659.91 = 72,152.70 : x
  2. Step 2: Convert to fraction form
    128,749.50/177,659.91 = 72,152.70/x
  3. Step 3: Cross multiply
    128,749.50x = 177,659.91 × 72,152.70
  4. Step 4: Simplify right side
    128,749.50x = 12,818,642,188.26
  5. Step 5: Solve for x
    x = 12,818,642,188.26/128,749.50
  6. Step 6: Final answer
    x = 99,562.66

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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.