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Finding the Fourth Proportional to 101,147.57, 139,209.13 and 74,247.47

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Solution

The fourth proportional to 101,147.57, 139,209.13 and 74,247.47 is: 102,186.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,147.57 : 139,209.13 = 74,247.47 : x
  2. Step 2: Convert to fraction form
    101,147.57/139,209.13 = 74,247.47/x
  3. Step 3: Cross multiply
    101,147.57x = 139,209.13 × 74,247.47
  4. Step 4: Simplify right side
    101,147.57x = 10,335,925,703.40
  5. Step 5: Solve for x
    x = 10,335,925,703.40/101,147.57
  6. Step 6: Final answer
    x = 102,186.59

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1.5x scale

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.