Home / 100,101.08-138,139.50-54,779.07

Finding the Fourth Proportional to 100,101.08, 138,139.50 and 54,779.07

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Solution

The fourth proportional to 100,101.08, 138,139.50 and 54,779.07 is: 75,595.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,101.08 : 138,139.50 = 54,779.07 : x
  2. Step 2: Convert to fraction form
    100,101.08/138,139.50 = 54,779.07/x
  3. Step 3: Cross multiply
    100,101.08x = 138,139.50 × 54,779.07
  4. Step 4: Simplify right side
    100,101.08x = 7,567,152,616.82
  5. Step 5: Solve for x
    x = 7,567,152,616.82/100,101.08
  6. Step 6: Final answer
    x = 75,595.11

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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.