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Finding the Fourth Proportional to 172,587.99, 238,171.30 and 100,981.81

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Solution

The fourth proportional to 172,587.99, 238,171.30 and 100,981.81 is: 139,354.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,587.99 : 238,171.30 = 100,981.81 : x
  2. Step 2: Convert to fraction form
    172,587.99/238,171.30 = 100,981.81/x
  3. Step 3: Cross multiply
    172,587.99x = 238,171.30 × 100,981.81
  4. Step 4: Simplify right side
    172,587.99x = 24,050,968,459.14
  5. Step 5: Solve for x
    x = 24,050,968,459.14/172,587.99
  6. Step 6: Final answer
    x = 139,354.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.