Home / 128,586.53-177,447.54-71,225.66

Finding the Fourth Proportional to 128,586.53, 177,447.54 and 71,225.66

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Solution

The fourth proportional to 128,586.53, 177,447.54 and 71,225.66 is: 98,290.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,586.53 : 177,447.54 = 71,225.66 : x
  2. Step 2: Convert to fraction form
    128,586.53/177,447.54 = 71,225.66/x
  3. Step 3: Cross multiply
    128,586.53x = 177,447.54 × 71,225.66
  4. Step 4: Simplify right side
    128,586.53x = 12,638,818,595.50
  5. Step 5: Solve for x
    x = 12,638,818,595.50/128,586.53
  6. Step 6: Final answer
    x = 98,290.38

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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.