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Finding the Fourth Proportional to 74,580.42, 111,870.63 and 61,405.12

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Solution

The fourth proportional to 74,580.42, 111,870.63 and 61,405.12 is: 92,107.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,580.42 : 111,870.63 = 61,405.12 : x
  2. Step 2: Convert to fraction form
    74,580.42/111,870.63 = 61,405.12/x
  3. Step 3: Cross multiply
    74,580.42x = 111,870.63 × 61,405.12
  4. Step 4: Simplify right side
    74,580.42x = 6,869,429,459.63
  5. Step 5: Solve for x
    x = 6,869,429,459.63/74,580.42
  6. Step 6: Final answer
    x = 92,107.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.