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Finding the Fourth Proportional to 72,695.70, 109,047.15 and 37,703.70

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Solution

The fourth proportional to 72,695.70, 109,047.15 and 37,703.70 is: 56,557.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695.70 : 109,047.15 = 37,703.70 : x
  2. Step 2: Convert to fraction form
    72,695.70/109,047.15 = 37,703.70/x
  3. Step 3: Cross multiply
    72,695.70x = 109,047.15 × 37,703.70
  4. Step 4: Simplify right side
    72,695.70x = 4,111,481,029.46
  5. Step 5: Solve for x
    x = 4,111,481,029.46/72,695.70
  6. Step 6: Final answer
    x = 56,557.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.