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Finding the Fourth Proportional to 74,674.40, 103,064.75 and 42,864.08

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Solution

The fourth proportional to 74,674.40, 103,064.75 and 42,864.08 is: 59,160.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,674.40 : 103,064.75 = 42,864.08 : x
  2. Step 2: Convert to fraction form
    74,674.40/103,064.75 = 42,864.08/x
  3. Step 3: Cross multiply
    74,674.40x = 103,064.75 × 42,864.08
  4. Step 4: Simplify right side
    74,674.40x = 4,417,774,959.54
  5. Step 5: Solve for x
    x = 4,417,774,959.54/74,674.40
  6. Step 6: Final answer
    x = 59,160.51

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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.