Home / 105,138.68-145,143.42-64,874.63

Finding the Fourth Proportional to 105,138.68, 145,143.42 and 64,874.63

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Solution

The fourth proportional to 105,138.68, 145,143.42 and 64,874.63 is: 89,559.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,138.68 : 145,143.42 = 64,874.63 : x
  2. Step 2: Convert to fraction form
    105,138.68/145,143.42 = 64,874.63/x
  3. Step 3: Cross multiply
    105,138.68x = 145,143.42 × 64,874.63
  4. Step 4: Simplify right side
    105,138.68x = 9,416,124,781.53
  5. Step 5: Solve for x
    x = 9,416,124,781.53/105,138.68
  6. Step 6: Final answer
    x = 89,559.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.