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Finding the Fourth Proportional to 268,730.34, 403,030.71 and 79,139.04

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Solution

The fourth proportional to 268,730.34, 403,030.71 and 79,139.04 is: 118,689.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,730.34 : 403,030.71 = 79,139.04 : x
  2. Step 2: Convert to fraction form
    268,730.34/403,030.71 = 79,139.04/x
  3. Step 3: Cross multiply
    268,730.34x = 403,030.71 × 79,139.04
  4. Step 4: Simplify right side
    268,730.34x = 31,895,463,479.92
  5. Step 5: Solve for x
    x = 31,895,463,479.92/268,730.34
  6. Step 6: Final answer
    x = 118,689.48

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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.