Home / 103,399.20-142,779.60-100,055.52

Finding the Fourth Proportional to 103,399.20, 142,779.60 and 100,055.52

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Solution

The fourth proportional to 103,399.20, 142,779.60 and 100,055.52 is: 138,162.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,399.20 : 142,779.60 = 100,055.52 : x
  2. Step 2: Convert to fraction form
    103,399.20/142,779.60 = 100,055.52/x
  3. Step 3: Cross multiply
    103,399.20x = 142,779.60 × 100,055.52
  4. Step 4: Simplify right side
    103,399.20x = 14,285,887,123.39
  5. Step 5: Solve for x
    x = 14,285,887,123.39/103,399.20
  6. Step 6: Final answer
    x = 138,162.45

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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.