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Finding the Fourth Proportional to 126,703.65, 174,848.81 and 72,988.50

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Solution

The fourth proportional to 126,703.65, 174,848.81 and 72,988.50 is: 100,722.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,703.65 : 174,848.81 = 72,988.50 : x
  2. Step 2: Convert to fraction form
    126,703.65/174,848.81 = 72,988.50/x
  3. Step 3: Cross multiply
    126,703.65x = 174,848.81 × 72,988.50
  4. Step 4: Simplify right side
    126,703.65x = 12,761,952,003.74
  5. Step 5: Solve for x
    x = 12,761,952,003.74/126,703.65
  6. Step 6: Final answer
    x = 100,722.84

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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.