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Finding the Fourth Proportional to 70,938.88, 106,425.60 and 21,690.88

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Solution

The fourth proportional to 70,938.88, 106,425.60 and 21,690.88 is: 32,541.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,938.88 : 106,425.60 = 21,690.88 : x
  2. Step 2: Convert to fraction form
    70,938.88/106,425.60 = 21,690.88/x
  3. Step 3: Cross multiply
    70,938.88x = 106,425.60 × 21,690.88
  4. Step 4: Simplify right side
    70,938.88x = 2,308,464,918.53
  5. Step 5: Solve for x
    x = 2,308,464,918.53/70,938.88
  6. Step 6: Final answer
    x = 32,541.60

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1.5x scale

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.