Home / 145,667.08-201,020.90-81,135.80

Finding the Fourth Proportional to 145,667.08, 201,020.90 and 81,135.80

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Solution

The fourth proportional to 145,667.08, 201,020.90 and 81,135.80 is: 111,967.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,667.08 : 201,020.90 = 81,135.80 : x
  2. Step 2: Convert to fraction form
    145,667.08/201,020.90 = 81,135.80/x
  3. Step 3: Cross multiply
    145,667.08x = 201,020.90 × 81,135.80
  4. Step 4: Simplify right side
    145,667.08x = 16,309,990,127.44
  5. Step 5: Solve for x
    x = 16,309,990,127.44/145,667.08
  6. Step 6: Final answer
    x = 111,967.58

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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.