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Finding the Fourth Proportional to 74,438.40, 111,657.60 and 42,848.40

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Solution

The fourth proportional to 74,438.40, 111,657.60 and 42,848.40 is: 64,272.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,438.40 : 111,657.60 = 42,848.40 : x
  2. Step 2: Convert to fraction form
    74,438.40/111,657.60 = 42,848.40/x
  3. Step 3: Cross multiply
    74,438.40x = 111,657.60 × 42,848.40
  4. Step 4: Simplify right side
    74,438.40x = 4,784,349,507.84
  5. Step 5: Solve for x
    x = 4,784,349,507.84/74,438.40
  6. Step 6: Final answer
    x = 64,272.60

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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.