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Finding the Fourth Proportional to 68,920.79, 103,421.81 and 28,946.79

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Solution

The fourth proportional to 68,920.79, 103,421.81 and 28,946.79 is: 43,437.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,920.79 : 103,421.81 = 28,946.79 : x
  2. Step 2: Convert to fraction form
    68,920.79/103,421.81 = 28,946.79/x
  3. Step 3: Cross multiply
    68,920.79x = 103,421.81 × 28,946.79
  4. Step 4: Simplify right side
    68,920.79x = 2,993,729,415.49
  5. Step 5: Solve for x
    x = 2,993,729,415.49/68,920.79
  6. Step 6: Final answer
    x = 43,437.25

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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.