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Finding the Fourth Proportional to 72,703.50, 100,291.95 and 48,789.06

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Solution

The fourth proportional to 72,703.50, 100,291.95 and 48,789.06 is: 67,302.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,703.50 : 100,291.95 = 48,789.06 : x
  2. Step 2: Convert to fraction form
    72,703.50/100,291.95 = 48,789.06/x
  3. Step 3: Cross multiply
    72,703.50x = 100,291.95 × 48,789.06
  4. Step 4: Simplify right side
    72,703.50x = 4,893,149,966.07
  5. Step 5: Solve for x
    x = 4,893,149,966.07/72,703.50
  6. Step 6: Final answer
    x = 67,302.81

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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.