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Finding the Fourth Proportional to 201,875.90, 302,813.85 and 138,890.30

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Solution

The fourth proportional to 201,875.90, 302,813.85 and 138,890.30 is: 208,335.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,875.90 : 302,813.85 = 138,890.30 : x
  2. Step 2: Convert to fraction form
    201,875.90/302,813.85 = 138,890.30/x
  3. Step 3: Cross multiply
    201,875.90x = 302,813.85 × 138,890.30
  4. Step 4: Simplify right side
    201,875.90x = 42,057,906,470.66
  5. Step 5: Solve for x
    x = 42,057,906,470.66/201,875.90
  6. Step 6: Final answer
    x = 208,335.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.