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Finding the Fourth Proportional to 70,722.40, 106,070.64 and 28,600.24

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Solution

The fourth proportional to 70,722.40, 106,070.64 and 28,600.24 is: 42,895.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,722.40 : 106,070.64 = 28,600.24 : x
  2. Step 2: Convert to fraction form
    70,722.40/106,070.64 = 28,600.24/x
  3. Step 3: Cross multiply
    70,722.40x = 106,070.64 × 28,600.24
  4. Step 4: Simplify right side
    70,722.40x = 3,033,645,760.95
  5. Step 5: Solve for x
    x = 3,033,645,760.95/70,722.40
  6. Step 6: Final answer
    x = 42,895.12

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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.