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Finding the Fourth Proportional to 112,689.40, 168,788.47 and 56,431.39

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Solution

The fourth proportional to 112,689.40, 168,788.47 and 56,431.39 is: 84,524.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,689.40 : 168,788.47 = 56,431.39 : x
  2. Step 2: Convert to fraction form
    112,689.40/168,788.47 = 56,431.39/x
  3. Step 3: Cross multiply
    112,689.40x = 168,788.47 × 56,431.39
  4. Step 4: Simplify right side
    112,689.40x = 9,524,967,978.07
  5. Step 5: Solve for x
    x = 9,524,967,978.07/112,689.40
  6. Step 6: Final answer
    x = 84,524.08

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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.