Home / 145,097.12-200,243.60-81,439.20

Finding the Fourth Proportional to 145,097.12, 200,243.60 and 81,439.20

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Solution

The fourth proportional to 145,097.12, 200,243.60 and 81,439.20 is: 112,391.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,097.12 : 200,243.60 = 81,439.20 : x
  2. Step 2: Convert to fraction form
    145,097.12/200,243.60 = 81,439.20/x
  3. Step 3: Cross multiply
    145,097.12x = 200,243.60 × 81,439.20
  4. Step 4: Simplify right side
    145,097.12x = 16,307,678,589.12
  5. Step 5: Solve for x
    x = 16,307,678,589.12/145,097.12
  6. Step 6: Final answer
    x = 112,391.47

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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.