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Finding the Fourth Proportional to 210,860.96, 291,108.42 and 139,448.12

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Solution

The fourth proportional to 210,860.96, 291,108.42 and 139,448.12 is: 192,517.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,860.96 : 291,108.42 = 139,448.12 : x
  2. Step 2: Convert to fraction form
    210,860.96/291,108.42 = 139,448.12/x
  3. Step 3: Cross multiply
    210,860.96x = 291,108.42 × 139,448.12
  4. Step 4: Simplify right side
    210,860.96x = 40,594,521,885.17
  5. Step 5: Solve for x
    x = 40,594,521,885.17/210,860.96
  6. Step 6: Final answer
    x = 192,517.96

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1.5x scale

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.