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Finding the Fourth Proportional to 74,172.48, 102,356.28 and 42,338.40

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Solution

The fourth proportional to 74,172.48, 102,356.28 and 42,338.40 is: 58,426.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,172.48 : 102,356.28 = 42,338.40 : x
  2. Step 2: Convert to fraction form
    74,172.48/102,356.28 = 42,338.40/x
  3. Step 3: Cross multiply
    74,172.48x = 102,356.28 × 42,338.40
  4. Step 4: Simplify right side
    74,172.48x = 4,333,601,125.15
  5. Step 5: Solve for x
    x = 4,333,601,125.15/74,172.48
  6. Step 6: Final answer
    x = 58,426.00

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.