Home / 85,509.90-128,278.89-26,345.58

Finding the Fourth Proportional to 85,509.90, 128,278.89 and 26,345.58

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Solution

The fourth proportional to 85,509.90, 128,278.89 and 26,345.58 is: 39,522.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,509.90 : 128,278.89 = 26,345.58 : x
  2. Step 2: Convert to fraction form
    85,509.90/128,278.89 = 26,345.58/x
  3. Step 3: Cross multiply
    85,509.90x = 128,278.89 × 26,345.58
  4. Step 4: Simplify right side
    85,509.90x = 3,379,581,758.81
  5. Step 5: Solve for x
    x = 3,379,581,758.81/85,509.90
  6. Step 6: Final answer
    x = 39,522.70

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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.