Home / 85,788.40-128,699.61-26,621.54

Finding the Fourth Proportional to 85,788.40, 128,699.61 and 26,621.54

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Solution

The fourth proportional to 85,788.40, 128,699.61 and 26,621.54 is: 39,937.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,788.40 : 128,699.61 = 26,621.54 : x
  2. Step 2: Convert to fraction form
    85,788.40/128,699.61 = 26,621.54/x
  3. Step 3: Cross multiply
    85,788.40x = 128,699.61 × 26,621.54
  4. Step 4: Simplify right side
    85,788.40x = 3,426,182,137.35
  5. Step 5: Solve for x
    x = 3,426,182,137.35/85,788.40
  6. Step 6: Final answer
    x = 39,937.59

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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.