Home / 91,389.69-126,129.51-51,105.71

Finding the Fourth Proportional to 91,389.69, 126,129.51 and 51,105.71

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Solution

The fourth proportional to 91,389.69, 126,129.51 and 51,105.71 is: 70,532.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,389.69 : 126,129.51 = 51,105.71 : x
  2. Step 2: Convert to fraction form
    91,389.69/126,129.51 = 51,105.71/x
  3. Step 3: Cross multiply
    91,389.69x = 126,129.51 × 51,105.71
  4. Step 4: Simplify right side
    91,389.69x = 6,445,937,529.85
  5. Step 5: Solve for x
    x = 6,445,937,529.85/91,389.69
  6. Step 6: Final answer
    x = 70,532.44

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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.