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Finding the Fourth Proportional to 77,405.26, 106,820.48 and 43,421.30

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Solution

The fourth proportional to 77,405.26, 106,820.48 and 43,421.30 is: 59,922.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,405.26 : 106,820.48 = 43,421.30 : x
  2. Step 2: Convert to fraction form
    77,405.26/106,820.48 = 43,421.30/x
  3. Step 3: Cross multiply
    77,405.26x = 106,820.48 × 43,421.30
  4. Step 4: Simplify right side
    77,405.26x = 4,638,284,108.22
  5. Step 5: Solve for x
    x = 4,638,284,108.22/77,405.26
  6. Step 6: Final answer
    x = 59,922.08

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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.