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Finding the Fourth Proportional to 72,307.44, 108,450.45 and 42,335.51

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Solution

The fourth proportional to 72,307.44, 108,450.45 and 42,335.51 is: 63,496.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,307.44 : 108,450.45 = 42,335.51 : x
  2. Step 2: Convert to fraction form
    72,307.44/108,450.45 = 42,335.51/x
  3. Step 3: Cross multiply
    72,307.44x = 108,450.45 × 42,335.51
  4. Step 4: Simplify right side
    72,307.44x = 4,591,304,568.23
  5. Step 5: Solve for x
    x = 4,591,304,568.23/72,307.44
  6. Step 6: Final answer
    x = 63,496.99

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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.