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Finding the Fourth Proportional to 74,362.71, 102,617.78 and 42,530.79

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Solution

The fourth proportional to 74,362.71, 102,617.78 and 42,530.79 is: 58,690.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,362.71 : 102,617.78 = 42,530.79 : x
  2. Step 2: Convert to fraction form
    74,362.71/102,617.78 = 42,530.79/x
  3. Step 3: Cross multiply
    74,362.71x = 102,617.78 × 42,530.79
  4. Step 4: Simplify right side
    74,362.71x = 4,364,415,038.79
  5. Step 5: Solve for x
    x = 4,364,415,038.79/74,362.71
  6. Step 6: Final answer
    x = 58,690.91

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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.