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Finding the Fourth Proportional to 72,810.27, 100,477.95 and 40,979.16

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Solution

The fourth proportional to 72,810.27, 100,477.95 and 40,979.16 is: 56,551.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,810.27 : 100,477.95 = 40,979.16 : x
  2. Step 2: Convert to fraction form
    72,810.27/100,477.95 = 40,979.16/x
  3. Step 3: Cross multiply
    72,810.27x = 100,477.95 × 40,979.16
  4. Step 4: Simplify right side
    72,810.27x = 4,117,501,835.85
  5. Step 5: Solve for x
    x = 4,117,501,835.85/72,810.27
  6. Step 6: Final answer
    x = 56,551.11

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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.