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Finding the Fourth Proportional to 72,127.89, 108,187.79 and 19,533.51

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Solution

The fourth proportional to 72,127.89, 108,187.79 and 19,533.51 is: 29,299.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,127.89 : 108,187.79 = 19,533.51 : x
  2. Step 2: Convert to fraction form
    72,127.89/108,187.79 = 19,533.51/x
  3. Step 3: Cross multiply
    72,127.89x = 108,187.79 × 19,533.51
  4. Step 4: Simplify right side
    72,127.89x = 2,113,287,180.18
  5. Step 5: Solve for x
    x = 2,113,287,180.18/72,127.89
  6. Step 6: Final answer
    x = 29,299.17

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1.5x scale

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.