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Finding the Fourth Proportional to 163,430.85, 225,555.59 and 91,810.95

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Solution

The fourth proportional to 163,430.85, 225,555.59 and 91,810.95 is: 126,710.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,430.85 : 225,555.59 = 91,810.95 : x
  2. Step 2: Convert to fraction form
    163,430.85/225,555.59 = 91,810.95/x
  3. Step 3: Cross multiply
    163,430.85x = 225,555.59 × 91,810.95
  4. Step 4: Simplify right side
    163,430.85x = 20,708,472,536.66
  5. Step 5: Solve for x
    x = 20,708,472,536.66/163,430.85
  6. Step 6: Final answer
    x = 126,710.91

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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.