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Finding the Fourth Proportional to 212,420.64, 292,991.16 and 139,800.39

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Solution

The fourth proportional to 212,420.64, 292,991.16 and 139,800.39 is: 192,826.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,420.64 : 292,991.16 = 139,800.39 : x
  2. Step 2: Convert to fraction form
    212,420.64/292,991.16 = 139,800.39/x
  3. Step 3: Cross multiply
    212,420.64x = 292,991.16 × 139,800.39
  4. Step 4: Simplify right side
    212,420.64x = 40,960,278,434.55
  5. Step 5: Solve for x
    x = 40,960,278,434.55/212,420.64
  6. Step 6: Final answer
    x = 192,826.26

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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.