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Finding the Fourth Proportional to 205,590.30, 308,385.45 and 72,426.30

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Solution

The fourth proportional to 205,590.30, 308,385.45 and 72,426.30 is: 108,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,590.30 : 308,385.45 = 72,426.30 : x
  2. Step 2: Convert to fraction form
    205,590.30/308,385.45 = 72,426.30/x
  3. Step 3: Cross multiply
    205,590.30x = 308,385.45 × 72,426.30
  4. Step 4: Simplify right side
    205,590.30x = 22,335,217,117.34
  5. Step 5: Solve for x
    x = 22,335,217,117.34/205,590.30
  6. Step 6: Final answer
    x = 108,639.45

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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.