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Finding the Fourth Proportional to 105,599.78, 145,726.47 and 57,200.78

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Solution

The fourth proportional to 105,599.78, 145,726.47 and 57,200.78 is: 78,936.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,599.78 : 145,726.47 = 57,200.78 : x
  2. Step 2: Convert to fraction form
    105,599.78/145,726.47 = 57,200.78/x
  3. Step 3: Cross multiply
    105,599.78x = 145,726.47 × 57,200.78
  4. Step 4: Simplify right side
    105,599.78x = 8,335,667,022.01
  5. Step 5: Solve for x
    x = 8,335,667,022.01/105,599.78
  6. Step 6: Final answer
    x = 78,936.41

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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.