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Finding the Fourth Proportional to 126,711.51, 174,881.51 and 72,263.79

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Solution

The fourth proportional to 126,711.51, 174,881.51 and 72,263.79 is: 99,735.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,711.51 : 174,881.51 = 72,263.79 : x
  2. Step 2: Convert to fraction form
    126,711.51/174,881.51 = 72,263.79/x
  3. Step 3: Cross multiply
    126,711.51x = 174,881.51 × 72,263.79
  4. Step 4: Simplify right side
    126,711.51x = 12,637,600,713.52
  5. Step 5: Solve for x
    x = 12,637,600,713.52/126,711.51
  6. Step 6: Final answer
    x = 99,735.22

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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.