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Finding the Fourth Proportional to 79,689.17, 118,950.70 and 70,230.95

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Solution

The fourth proportional to 79,689.17, 118,950.70 and 70,230.95 is: 104,832.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.17 : 118,950.70 = 70,230.95 : x
  2. Step 2: Convert to fraction form
    79,689.17/118,950.70 = 70,230.95/x
  3. Step 3: Cross multiply
    79,689.17x = 118,950.70 × 70,230.95
  4. Step 4: Simplify right side
    79,689.17x = 8,354,020,664.17
  5. Step 5: Solve for x
    x = 8,354,020,664.17/79,689.17
  6. Step 6: Final answer
    x = 104,832.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.