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Finding the Fourth Proportional to 290,085.68, 435,109.08 and 79,706

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Solution

The fourth proportional to 290,085.68, 435,109.08 and 79,706 is: 119,553.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,085.68 : 435,109.08 = 79,706 : x
  2. Step 2: Convert to fraction form
    290,085.68/435,109.08 = 79,706/x
  3. Step 3: Cross multiply
    290,085.68x = 435,109.08 × 79,706
  4. Step 4: Simplify right side
    290,085.68x = 34,680,804,330.48
  5. Step 5: Solve for x
    x = 34,680,804,330.48/290,085.68
  6. Step 6: Final answer
    x = 119,553.66

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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.