Home / 145,143.36-200,291.40-81,479.88

Finding the Fourth Proportional to 145,143.36, 200,291.40 and 81,479.88

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Solution

The fourth proportional to 145,143.36, 200,291.40 and 81,479.88 is: 112,438.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,143.36 : 200,291.40 = 81,479.88 : x
  2. Step 2: Convert to fraction form
    145,143.36/200,291.40 = 81,479.88/x
  3. Step 3: Cross multiply
    145,143.36x = 200,291.40 × 81,479.88
  4. Step 4: Simplify right side
    145,143.36x = 16,319,719,237.03
  5. Step 5: Solve for x
    x = 16,319,719,237.03/145,143.36
  6. Step 6: Final answer
    x = 112,438.62

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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.