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Finding the Fourth Proportional to 66,548.34, 91,878.16 and 42,362.95

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Solution

The fourth proportional to 66,548.34, 91,878.16 and 42,362.95 is: 58,487.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,548.34 : 91,878.16 = 42,362.95 : x
  2. Step 2: Convert to fraction form
    66,548.34/91,878.16 = 42,362.95/x
  3. Step 3: Cross multiply
    66,548.34x = 91,878.16 × 42,362.95
  4. Step 4: Simplify right side
    66,548.34x = 3,892,229,898.17
  5. Step 5: Solve for x
    x = 3,892,229,898.17/66,548.34
  6. Step 6: Final answer
    x = 58,487.26

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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.