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Finding the Fourth Proportional to 91,801.58, 126,678.72 and 51,509.74

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Solution

The fourth proportional to 91,801.58, 126,678.72 and 51,509.74 is: 71,079.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,801.58 : 126,678.72 = 51,509.74 : x
  2. Step 2: Convert to fraction form
    91,801.58/126,678.72 = 51,509.74/x
  3. Step 3: Cross multiply
    91,801.58x = 126,678.72 × 51,509.74
  4. Step 4: Simplify right side
    91,801.58x = 6,525,187,930.73
  5. Step 5: Solve for x
    x = 6,525,187,930.73/91,801.58
  6. Step 6: Final answer
    x = 71,079.26

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1.5x scale

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.