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Finding the Fourth Proportional to 243,590.19, 365,385.30 and 85,781.67

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Solution

The fourth proportional to 243,590.19, 365,385.30 and 85,781.67 is: 128,672.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,590.19 : 365,385.30 = 85,781.67 : x
  2. Step 2: Convert to fraction form
    243,590.19/365,385.30 = 85,781.67/x
  3. Step 3: Cross multiply
    243,590.19x = 365,385.30 × 85,781.67
  4. Step 4: Simplify right side
    243,590.19x = 31,343,361,227.45
  5. Step 5: Solve for x
    x = 31,343,361,227.45/243,590.19
  6. Step 6: Final answer
    x = 128,672.51

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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.