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Finding the Fourth Proportional to 74,504.64, 102,808.32 and 42,670.40

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Solution

The fourth proportional to 74,504.64, 102,808.32 and 42,670.40 is: 58,880.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,504.64 : 102,808.32 = 42,670.40 : x
  2. Step 2: Convert to fraction form
    74,504.64/102,808.32 = 42,670.40/x
  3. Step 3: Cross multiply
    74,504.64x = 102,808.32 × 42,670.40
  4. Step 4: Simplify right side
    74,504.64x = 4,386,872,137.73
  5. Step 5: Solve for x
    x = 4,386,872,137.73/74,504.64
  6. Step 6: Final answer
    x = 58,880.52

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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.