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Finding the Fourth Proportional to 93,655.90, 140,361.27 and 81,779.74

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Solution

The fourth proportional to 93,655.90, 140,361.27 and 81,779.74 is: 122,562.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,655.90 : 140,361.27 = 81,779.74 : x
  2. Step 2: Convert to fraction form
    93,655.90/140,361.27 = 81,779.74/x
  3. Step 3: Cross multiply
    93,655.90x = 140,361.27 × 81,779.74
  4. Step 4: Simplify right side
    93,655.90x = 11,478,708,166.67
  5. Step 5: Solve for x
    x = 11,478,708,166.67/93,655.90
  6. Step 6: Final answer
    x = 122,562.57

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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.