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Finding the Fourth Proportional to 101,379.16, 139,868.58 and 61,077.70

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Solution

The fourth proportional to 101,379.16, 139,868.58 and 61,077.70 is: 84,266.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,379.16 : 139,868.58 = 61,077.70 : x
  2. Step 2: Convert to fraction form
    101,379.16/139,868.58 = 61,077.70/x
  3. Step 3: Cross multiply
    101,379.16x = 139,868.58 × 61,077.70
  4. Step 4: Simplify right side
    101,379.16x = 8,542,851,168.67
  5. Step 5: Solve for x
    x = 8,542,851,168.67/101,379.16
  6. Step 6: Final answer
    x = 84,266.34

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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.