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Finding the Fourth Proportional to 101,028.63, 139,392.16 and 57,420.57

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Solution

The fourth proportional to 101,028.63, 139,392.16 and 57,420.57 is: 79,224.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,028.63 : 139,392.16 = 57,420.57 : x
  2. Step 2: Convert to fraction form
    101,028.63/139,392.16 = 57,420.57/x
  3. Step 3: Cross multiply
    101,028.63x = 139,392.16 × 57,420.57
  4. Step 4: Simplify right side
    101,028.63x = 8,003,977,280.73
  5. Step 5: Solve for x
    x = 8,003,977,280.73/101,028.63
  6. Step 6: Final answer
    x = 79,224.84

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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.