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Finding the Fourth Proportional to 260,437.64, 390,687.68 and 91,923.16

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Solution

The fourth proportional to 260,437.64, 390,687.68 and 91,923.16 is: 137,895.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,437.64 : 390,687.68 = 91,923.16 : x
  2. Step 2: Convert to fraction form
    260,437.64/390,687.68 = 91,923.16/x
  3. Step 3: Cross multiply
    260,437.64x = 390,687.68 × 91,923.16
  4. Step 4: Simplify right side
    260,437.64x = 35,913,246,118.67
  5. Step 5: Solve for x
    x = 35,913,246,118.67/260,437.64
  6. Step 6: Final answer
    x = 137,895.76

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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.