Home / 128,369.13-177,089.75-83,061.74

Finding the Fourth Proportional to 128,369.13, 177,089.75 and 83,061.74

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Solution

The fourth proportional to 128,369.13, 177,089.75 and 83,061.74 is: 114,586.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,369.13 : 177,089.75 = 83,061.74 : x
  2. Step 2: Convert to fraction form
    128,369.13/177,089.75 = 83,061.74/x
  3. Step 3: Cross multiply
    128,369.13x = 177,089.75 × 83,061.74
  4. Step 4: Simplify right side
    128,369.13x = 14,709,381,470.41
  5. Step 5: Solve for x
    x = 14,709,381,470.41/128,369.13
  6. Step 6: Final answer
    x = 114,586.59

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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.