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Finding the Fourth Proportional to 210,859.96, 291,107.04 and 139,447.12

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Solution

The fourth proportional to 210,859.96, 291,107.04 and 139,447.12 is: 192,516.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,859.96 : 291,107.04 = 139,447.12 : x
  2. Step 2: Convert to fraction form
    210,859.96/291,107.04 = 139,447.12/x
  3. Step 3: Cross multiply
    210,859.96x = 291,107.04 × 139,447.12
  4. Step 4: Simplify right side
    210,859.96x = 40,594,038,339.72
  5. Step 5: Solve for x
    x = 40,594,038,339.72/210,859.96
  6. Step 6: Final answer
    x = 192,516.58

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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.