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Finding the Fourth Proportional to 145,519.02, 200,814.21 and 81,856.89

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Solution

The fourth proportional to 145,519.02, 200,814.21 and 81,856.89 is: 112,961.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,519.02 : 200,814.21 = 81,856.89 : x
  2. Step 2: Convert to fraction form
    145,519.02/200,814.21 = 81,856.89/x
  3. Step 3: Cross multiply
    145,519.02x = 200,814.21 × 81,856.89
  4. Step 4: Simplify right side
    145,519.02x = 16,438,026,698.41
  5. Step 5: Solve for x
    x = 16,438,026,698.41/145,519.02
  6. Step 6: Final answer
    x = 112,961.36

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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.