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Finding the Fourth Proportional to 105,124.59, 145,104.12 and 64,850.91

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Solution

The fourth proportional to 105,124.59, 145,104.12 and 64,850.91 is: 89,514.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,124.59 : 145,104.12 = 64,850.91 : x
  2. Step 2: Convert to fraction form
    105,124.59/145,104.12 = 64,850.91/x
  3. Step 3: Cross multiply
    105,124.59x = 145,104.12 × 64,850.91
  4. Step 4: Simplify right side
    105,124.59x = 9,410,134,226.75
  5. Step 5: Solve for x
    x = 9,410,134,226.75/105,124.59
  6. Step 6: Final answer
    x = 89,514.11

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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.