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Finding the Fourth Proportional to 139,006.17, 191,685.29 and 118,929.51

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Solution

The fourth proportional to 139,006.17, 191,685.29 and 118,929.51 is: 164,000.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,006.17 : 191,685.29 = 118,929.51 : x
  2. Step 2: Convert to fraction form
    139,006.17/191,685.29 = 118,929.51/x
  3. Step 3: Cross multiply
    139,006.17x = 191,685.29 × 118,929.51
  4. Step 4: Simplify right side
    139,006.17x = 22,797,037,019.26
  5. Step 5: Solve for x
    x = 22,797,037,019.26/139,006.17
  6. Step 6: Final answer
    x = 164,000.18

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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.