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Finding the Fourth Proportional to 91,290.59, 125,978.68 and 51,004.63

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Solution

The fourth proportional to 91,290.59, 125,978.68 and 51,004.63 is: 70,385.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,290.59 : 125,978.68 = 51,004.63 : x
  2. Step 2: Convert to fraction form
    91,290.59/125,978.68 = 51,004.63/x
  3. Step 3: Cross multiply
    91,290.59x = 125,978.68 × 51,004.63
  4. Step 4: Simplify right side
    91,290.59x = 6,425,495,706.27
  5. Step 5: Solve for x
    x = 6,425,495,706.27/91,290.59
  6. Step 6: Final answer
    x = 70,385.08

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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.