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Finding the Fourth Proportional to 144,612.90, 216,919.35 and 74,628.90

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Solution

The fourth proportional to 144,612.90, 216,919.35 and 74,628.90 is: 111,943.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,612.90 : 216,919.35 = 74,628.90 : x
  2. Step 2: Convert to fraction form
    144,612.90/216,919.35 = 74,628.90/x
  3. Step 3: Cross multiply
    144,612.90x = 216,919.35 × 74,628.90
  4. Step 4: Simplify right side
    144,612.90x = 16,188,452,479.22
  5. Step 5: Solve for x
    x = 16,188,452,479.22/144,612.90
  6. Step 6: Final answer
    x = 111,943.35

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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.