Home / 85,445.68-128,190.40-26,281.86

Finding the Fourth Proportional to 85,445.68, 128,190.40 and 26,281.86

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Solution

The fourth proportional to 85,445.68, 128,190.40 and 26,281.86 is: 39,429.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,445.68 : 128,190.40 = 26,281.86 : x
  2. Step 2: Convert to fraction form
    85,445.68/128,190.40 = 26,281.86/x
  3. Step 3: Cross multiply
    85,445.68x = 128,190.40 × 26,281.86
  4. Step 4: Simplify right side
    85,445.68x = 3,369,082,146.14
  5. Step 5: Solve for x
    x = 3,369,082,146.14/85,445.68
  6. Step 6: Final answer
    x = 39,429.52

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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.