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Finding the Fourth Proportional to 210,435.90, 315,791.96 and 77,317.26

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Solution

The fourth proportional to 210,435.90, 315,791.96 and 77,317.26 is: 116,026.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,435.90 : 315,791.96 = 77,317.26 : x
  2. Step 2: Convert to fraction form
    210,435.90/315,791.96 = 77,317.26/x
  3. Step 3: Cross multiply
    210,435.90x = 315,791.96 × 77,317.26
  4. Step 4: Simplify right side
    210,435.90x = 24,416,168,690.64
  5. Step 5: Solve for x
    x = 24,416,168,690.64/210,435.90
  6. Step 6: Final answer
    x = 116,026.63

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1.5x scale

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.