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Finding the Fourth Proportional to 126,783, 174,959.88 and 69,421.28

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Solution

The fourth proportional to 126,783, 174,959.88 and 69,421.28 is: 95,801.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,783 : 174,959.88 = 69,421.28 : x
  2. Step 2: Convert to fraction form
    126,783/174,959.88 = 69,421.28/x
  3. Step 3: Cross multiply
    126,783x = 174,959.88 × 69,421.28
  4. Step 4: Simplify right side
    126,783x = 12,145,938,818.25
  5. Step 5: Solve for x
    x = 12,145,938,818.25/126,783
  6. Step 6: Final answer
    x = 95,801.01

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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.