Home / 85,641.45-128,421.60-25,646.83

Finding the Fourth Proportional to 85,641.45, 128,421.60 and 25,646.83

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Solution

The fourth proportional to 85,641.45, 128,421.60 and 25,646.83 is: 38,458.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,641.45 : 128,421.60 = 25,646.83 : x
  2. Step 2: Convert to fraction form
    85,641.45/128,421.60 = 25,646.83/x
  3. Step 3: Cross multiply
    85,641.45x = 128,421.60 × 25,646.83
  4. Step 4: Simplify right side
    85,641.45x = 3,293,606,670.56
  5. Step 5: Solve for x
    x = 3,293,606,670.56/85,641.45
  6. Step 6: Final answer
    x = 38,458.09

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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.