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Finding the Fourth Proportional to 72,569.66, 108,621.21 and 54,477.50

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Solution

The fourth proportional to 72,569.66, 108,621.21 and 54,477.50 is: 81,541.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,569.66 : 108,621.21 = 54,477.50 : x
  2. Step 2: Convert to fraction form
    72,569.66/108,621.21 = 54,477.50/x
  3. Step 3: Cross multiply
    72,569.66x = 108,621.21 × 54,477.50
  4. Step 4: Simplify right side
    72,569.66x = 5,917,411,967.78
  5. Step 5: Solve for x
    x = 5,917,411,967.78/72,569.66
  6. Step 6: Final answer
    x = 81,541.13

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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.