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Finding the Fourth Proportional to 210,453.16, 315,720.96 and 77,334.52

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Solution

The fourth proportional to 210,453.16, 315,720.96 and 77,334.52 is: 116,016.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,453.16 : 315,720.96 = 77,334.52 : x
  2. Step 2: Convert to fraction form
    210,453.16/315,720.96 = 77,334.52/x
  3. Step 3: Cross multiply
    210,453.16x = 315,720.96 × 77,334.52
  4. Step 4: Simplify right side
    210,453.16x = 24,416,128,895.54
  5. Step 5: Solve for x
    x = 24,416,128,895.54/210,453.16
  6. Step 6: Final answer
    x = 116,016.93

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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.