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Finding the Fourth Proportional to 100,779.93, 139,077 and 55,460.70

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Solution

The fourth proportional to 100,779.93, 139,077 and 55,460.70 is: 76,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,779.93 : 139,077 = 55,460.70 : x
  2. Step 2: Convert to fraction form
    100,779.93/139,077 = 55,460.70/x
  3. Step 3: Cross multiply
    100,779.93x = 139,077 × 55,460.70
  4. Step 4: Simplify right side
    100,779.93x = 7,713,307,773.90
  5. Step 5: Solve for x
    x = 7,713,307,773.90/100,779.93
  6. Step 6: Final answer
    x = 76,536.15

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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.