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Finding the Fourth Proportional to 74,602.68, 102,945.42 and 42,764.28

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Solution

The fourth proportional to 74,602.68, 102,945.42 and 42,764.28 is: 59,011.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,602.68 : 102,945.42 = 42,764.28 : x
  2. Step 2: Convert to fraction form
    74,602.68/102,945.42 = 42,764.28/x
  3. Step 3: Cross multiply
    74,602.68x = 102,945.42 × 42,764.28
  4. Step 4: Simplify right side
    74,602.68x = 4,402,386,765.60
  5. Step 5: Solve for x
    x = 4,402,386,765.60/74,602.68
  6. Step 6: Final answer
    x = 59,011.11

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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.