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Finding the Fourth Proportional to 101,390.16, 139,772.04 and 69,508.56

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Solution

The fourth proportional to 101,390.16, 139,772.04 and 69,508.56 is: 95,821.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,390.16 : 139,772.04 = 69,508.56 : x
  2. Step 2: Convert to fraction form
    101,390.16/139,772.04 = 69,508.56/x
  3. Step 3: Cross multiply
    101,390.16x = 139,772.04 × 69,508.56
  4. Step 4: Simplify right side
    101,390.16x = 9,715,353,228.66
  5. Step 5: Solve for x
    x = 9,715,353,228.66/101,390.16
  6. Step 6: Final answer
    x = 95,821.46

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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.