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Finding the Fourth Proportional to 100,101.95, 138,140.69 and 54,779.93

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Solution

The fourth proportional to 100,101.95, 138,140.69 and 54,779.93 is: 75,596.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,101.95 : 138,140.69 = 54,779.93 : x
  2. Step 2: Convert to fraction form
    100,101.95/138,140.69 = 54,779.93/x
  3. Step 3: Cross multiply
    100,101.95x = 138,140.69 × 54,779.93
  4. Step 4: Simplify right side
    100,101.95x = 7,567,336,363.75
  5. Step 5: Solve for x
    x = 7,567,336,363.75/100,101.95
  6. Step 6: Final answer
    x = 75,596.30

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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.