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Finding the Fourth Proportional to 139,353.63, 209,034.78 and 66,307.57

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Solution

The fourth proportional to 139,353.63, 209,034.78 and 66,307.57 is: 99,463.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,353.63 : 209,034.78 = 66,307.57 : x
  2. Step 2: Convert to fraction form
    139,353.63/209,034.78 = 66,307.57/x
  3. Step 3: Cross multiply
    139,353.63x = 209,034.78 × 66,307.57
  4. Step 4: Simplify right side
    139,353.63x = 13,860,588,307.28
  5. Step 5: Solve for x
    x = 13,860,588,307.28/139,353.63
  6. Step 6: Final answer
    x = 99,463.42

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1.5x scale

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.