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Finding the Fourth Proportional to 101,216.40, 151,916.40 and 51,331.20

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Solution

The fourth proportional to 101,216.40, 151,916.40 and 51,331.20 is: 77,043.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,216.40 : 151,916.40 = 51,331.20 : x
  2. Step 2: Convert to fraction form
    101,216.40/151,916.40 = 51,331.20/x
  3. Step 3: Cross multiply
    101,216.40x = 151,916.40 × 51,331.20
  4. Step 4: Simplify right side
    101,216.40x = 7,798,051,111.68
  5. Step 5: Solve for x
    x = 7,798,051,111.68/101,216.40
  6. Step 6: Final answer
    x = 77,043.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.