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Finding the Fourth Proportional to 231,010.79, 346,547.84 and 81,216.81

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Solution

The fourth proportional to 231,010.79, 346,547.84 and 81,216.81 is: 121,836.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,010.79 : 346,547.84 = 81,216.81 : x
  2. Step 2: Convert to fraction form
    231,010.79/346,547.84 = 81,216.81/x
  3. Step 3: Cross multiply
    231,010.79x = 346,547.84 × 81,216.81
  4. Step 4: Simplify right side
    231,010.79x = 28,145,509,671.11
  5. Step 5: Solve for x
    x = 28,145,509,671.11/231,010.79
  6. Step 6: Final answer
    x = 121,836.34

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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.