Home / 145,712.19-201,086.20-81,185.71

Finding the Fourth Proportional to 145,712.19, 201,086.20 and 81,185.71

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Solution

The fourth proportional to 145,712.19, 201,086.20 and 81,185.71 is: 112,038.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,712.19 : 201,086.20 = 81,185.71 : x
  2. Step 2: Convert to fraction form
    145,712.19/201,086.20 = 81,185.71/x
  3. Step 3: Cross multiply
    145,712.19x = 201,086.20 × 81,185.71
  4. Step 4: Simplify right side
    145,712.19x = 16,325,325,918.20
  5. Step 5: Solve for x
    x = 16,325,325,918.20/145,712.19
  6. Step 6: Final answer
    x = 112,038.16

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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.