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Finding the Fourth Proportional to 99,785.79, 149,590.66 and 40,670.91

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Solution

The fourth proportional to 99,785.79, 149,590.66 and 40,670.91 is: 60,970.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,785.79 : 149,590.66 = 40,670.91 : x
  2. Step 2: Convert to fraction form
    99,785.79/149,590.66 = 40,670.91/x
  3. Step 3: Cross multiply
    99,785.79x = 149,590.66 × 40,670.91
  4. Step 4: Simplify right side
    99,785.79x = 6,083,988,269.70
  5. Step 5: Solve for x
    x = 6,083,988,269.70/99,785.79
  6. Step 6: Final answer
    x = 60,970.49

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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.