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Finding the Fourth Proportional to 119,712, 165,217.51 and 68,740.68

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Solution

The fourth proportional to 119,712, 165,217.51 and 68,740.68 is: 94,870.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,712 : 165,217.51 = 68,740.68 : x
  2. Step 2: Convert to fraction form
    119,712/165,217.51 = 68,740.68/x
  3. Step 3: Cross multiply
    119,712x = 165,217.51 × 68,740.68
  4. Step 4: Simplify right side
    119,712x = 11,357,163,985.31
  5. Step 5: Solve for x
    x = 11,357,163,985.31/119,712
  6. Step 6: Final answer
    x = 94,870.72

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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.