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Finding the Fourth Proportional to 101,790.12, 152,580.66 and 42,660.12

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Solution

The fourth proportional to 101,790.12, 152,580.66 and 42,660.12 is: 63,946.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,790.12 : 152,580.66 = 42,660.12 : x
  2. Step 2: Convert to fraction form
    101,790.12/152,580.66 = 42,660.12/x
  3. Step 3: Cross multiply
    101,790.12x = 152,580.66 × 42,660.12
  4. Step 4: Simplify right side
    101,790.12x = 6,509,109,265.28
  5. Step 5: Solve for x
    x = 6,509,109,265.28/101,790.12
  6. Step 6: Final answer
    x = 63,946.38

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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.