Home / 85,636.90-128,444.01-38,879.02

Finding the Fourth Proportional to 85,636.90, 128,444.01 and 38,879.02

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Solution

The fourth proportional to 85,636.90, 128,444.01 and 38,879.02 is: 58,313.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,636.90 : 128,444.01 = 38,879.02 : x
  2. Step 2: Convert to fraction form
    85,636.90/128,444.01 = 38,879.02/x
  3. Step 3: Cross multiply
    85,636.90x = 128,444.01 × 38,879.02
  4. Step 4: Simplify right side
    85,636.90x = 4,993,777,233.67
  5. Step 5: Solve for x
    x = 4,993,777,233.67/85,636.90
  6. Step 6: Final answer
    x = 58,313.38

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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.