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Finding the Fourth Proportional to 101,787.65, 140,467.80 and 56,468.60

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Solution

The fourth proportional to 101,787.65, 140,467.80 and 56,468.60 is: 77,927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,787.65 : 140,467.80 = 56,468.60 : x
  2. Step 2: Convert to fraction form
    101,787.65/140,467.80 = 56,468.60/x
  3. Step 3: Cross multiply
    101,787.65x = 140,467.80 × 56,468.60
  4. Step 4: Simplify right side
    101,787.65x = 7,932,020,011.08
  5. Step 5: Solve for x
    x = 7,932,020,011.08/101,787.65
  6. Step 6: Final answer
    x = 77,927.14

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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.