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Finding the Fourth Proportional to 91,293.88, 125,985.72 and 51,007.72

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Solution

The fourth proportional to 91,293.88, 125,985.72 and 51,007.72 is: 70,390.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,293.88 : 125,985.72 = 51,007.72 : x
  2. Step 2: Convert to fraction form
    91,293.88/125,985.72 = 51,007.72/x
  3. Step 3: Cross multiply
    91,293.88x = 125,985.72 × 51,007.72
  4. Step 4: Simplify right side
    91,293.88x = 6,426,244,329.76
  5. Step 5: Solve for x
    x = 6,426,244,329.76/91,293.88
  6. Step 6: Final answer
    x = 70,390.75

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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.