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Finding the Fourth Proportional to 91,602.78, 126,410.67 and 51,315.81

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Solution

The fourth proportional to 91,602.78, 126,410.67 and 51,315.81 is: 70,815.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,602.78 : 126,410.67 = 51,315.81 : x
  2. Step 2: Convert to fraction form
    91,602.78/126,410.67 = 51,315.81/x
  3. Step 3: Cross multiply
    91,602.78x = 126,410.67 × 51,315.81
  4. Step 4: Simplify right side
    91,602.78x = 6,486,865,923.69
  5. Step 5: Solve for x
    x = 6,486,865,923.69/91,602.78
  6. Step 6: Final answer
    x = 70,815.16

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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.