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Finding the Fourth Proportional to 119,689.84, 165,111.28 and 91,346.32

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Solution

The fourth proportional to 119,689.84, 165,111.28 and 91,346.32 is: 126,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,689.84 : 165,111.28 = 91,346.32 : x
  2. Step 2: Convert to fraction form
    119,689.84/165,111.28 = 91,346.32/x
  3. Step 3: Cross multiply
    119,689.84x = 165,111.28 × 91,346.32
  4. Step 4: Simplify right side
    119,689.84x = 15,082,307,818.49
  5. Step 5: Solve for x
    x = 15,082,307,818.49/119,689.84
  6. Step 6: Final answer
    x = 126,011.60

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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.