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Finding the Fourth Proportional to 43,248.60, 64,728.90 and 31,368.60

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Solution

The fourth proportional to 43,248.60, 64,728.90 and 31,368.60 is: 46,948.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,248.60 : 64,728.90 = 31,368.60 : x
  2. Step 2: Convert to fraction form
    43,248.60/64,728.90 = 31,368.60/x
  3. Step 3: Cross multiply
    43,248.60x = 64,728.90 × 31,368.60
  4. Step 4: Simplify right side
    43,248.60x = 2,030,454,972.54
  5. Step 5: Solve for x
    x = 2,030,454,972.54/43,248.60
  6. Step 6: Final answer
    x = 46,948.46

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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.