Home / 86,027.52-128,779.20-69,231.36

Finding the Fourth Proportional to 86,027.52, 128,779.20 and 69,231.36

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Solution

The fourth proportional to 86,027.52, 128,779.20 and 69,231.36 is: 103,636.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,027.52 : 128,779.20 = 69,231.36 : x
  2. Step 2: Convert to fraction form
    86,027.52/128,779.20 = 69,231.36/x
  3. Step 3: Cross multiply
    86,027.52x = 128,779.20 × 69,231.36
  4. Step 4: Simplify right side
    86,027.52x = 8,915,559,155.71
  5. Step 5: Solve for x
    x = 8,915,559,155.71/86,027.52
  6. Step 6: Final answer
    x = 103,636.13

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1.5x scale

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.