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Finding the Fourth Proportional to 77,420.64, 106,842.10 and 43,886.64

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Solution

The fourth proportional to 77,420.64, 106,842.10 and 43,886.64 is: 60,564.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,420.64 : 106,842.10 = 43,886.64 : x
  2. Step 2: Convert to fraction form
    77,420.64/106,842.10 = 43,886.64/x
  3. Step 3: Cross multiply
    77,420.64x = 106,842.10 × 43,886.64
  4. Step 4: Simplify right side
    77,420.64x = 4,688,940,779.54
  5. Step 5: Solve for x
    x = 4,688,940,779.54/77,420.64
  6. Step 6: Final answer
    x = 60,564.48

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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.