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Finding the Fourth Proportional to 210,369.88, 315,303.80 and 121,435.48

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Solution

The fourth proportional to 210,369.88, 315,303.80 and 121,435.48 is: 182,008.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,369.88 : 315,303.80 = 121,435.48 : x
  2. Step 2: Convert to fraction form
    210,369.88/315,303.80 = 121,435.48/x
  3. Step 3: Cross multiply
    210,369.88x = 315,303.80 × 121,435.48
  4. Step 4: Simplify right side
    210,369.88x = 38,289,068,298.82
  5. Step 5: Solve for x
    x = 38,289,068,298.82/210,369.88
  6. Step 6: Final answer
    x = 182,008.32

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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.