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Finding the Fourth Proportional to 72,276.65, 108,218.14 and 56,210.40

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Solution

The fourth proportional to 72,276.65, 108,218.14 and 56,210.40 is: 84,162.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,276.65 : 108,218.14 = 56,210.40 : x
  2. Step 2: Convert to fraction form
    72,276.65/108,218.14 = 56,210.40/x
  3. Step 3: Cross multiply
    72,276.65x = 108,218.14 × 56,210.40
  4. Step 4: Simplify right side
    72,276.65x = 6,082,985,112.31
  5. Step 5: Solve for x
    x = 6,082,985,112.31/72,276.65
  6. Step 6: Final answer
    x = 84,162.52

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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.