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Finding the Fourth Proportional to 74,603.61, 102,935.25 and 42,331.05

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Solution

The fourth proportional to 74,603.61, 102,935.25 and 42,331.05 is: 58,406.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,603.61 : 102,935.25 = 42,331.05 : x
  2. Step 2: Convert to fraction form
    74,603.61/102,935.25 = 42,331.05/x
  3. Step 3: Cross multiply
    74,603.61x = 102,935.25 × 42,331.05
  4. Step 4: Simplify right side
    74,603.61x = 4,357,357,214.51
  5. Step 5: Solve for x
    x = 4,357,357,214.51/74,603.61
  6. Step 6: Final answer
    x = 58,406.79

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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.