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Finding the Fourth Proportional to 207,315.86, 310,776.75 and 81,037.06

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Solution

The fourth proportional to 207,315.86, 310,776.75 and 81,037.06 is: 121,478.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,315.86 : 310,776.75 = 81,037.06 : x
  2. Step 2: Convert to fraction form
    207,315.86/310,776.75 = 81,037.06/x
  3. Step 3: Cross multiply
    207,315.86x = 310,776.75 × 81,037.06
  4. Step 4: Simplify right side
    207,315.86x = 25,184,433,359.41
  5. Step 5: Solve for x
    x = 25,184,433,359.41/207,315.86
  6. Step 6: Final answer
    x = 121,478.57

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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.