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Finding the Fourth Proportional to 101,302.56, 139,795.11 and 55,978.20

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Solution

The fourth proportional to 101,302.56, 139,795.11 and 55,978.20 is: 77,248.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,302.56 : 139,795.11 = 55,978.20 : x
  2. Step 2: Convert to fraction form
    101,302.56/139,795.11 = 55,978.20/x
  3. Step 3: Cross multiply
    101,302.56x = 139,795.11 × 55,978.20
  4. Step 4: Simplify right side
    101,302.56x = 7,825,478,626.60
  5. Step 5: Solve for x
    x = 7,825,478,626.60/101,302.56
  6. Step 6: Final answer
    x = 77,248.58

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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.