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Finding the Fourth Proportional to 353,642.91, 530,459.17 and 87,403.45

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Solution

The fourth proportional to 353,642.91, 530,459.17 and 87,403.45 is: 131,103.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,642.91 : 530,459.17 = 87,403.45 : x
  2. Step 2: Convert to fraction form
    353,642.91/530,459.17 = 87,403.45/x
  3. Step 3: Cross multiply
    353,642.91x = 530,459.17 × 87,403.45
  4. Step 4: Simplify right side
    353,642.91x = 46,363,961,105.12
  5. Step 5: Solve for x
    x = 46,363,961,105.12/353,642.91
  6. Step 6: Final answer
    x = 131,103.89

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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.