Home / 85,981.08-128,977.80-36,010.92

Finding the Fourth Proportional to 85,981.08, 128,977.80 and 36,010.92

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Solution

The fourth proportional to 85,981.08, 128,977.80 and 36,010.92 is: 54,018.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,981.08 : 128,977.80 = 36,010.92 : x
  2. Step 2: Convert to fraction form
    85,981.08/128,977.80 = 36,010.92/x
  3. Step 3: Cross multiply
    85,981.08x = 128,977.80 × 36,010.92
  4. Step 4: Simplify right side
    85,981.08x = 4,644,609,237.58
  5. Step 5: Solve for x
    x = 4,644,609,237.58/85,981.08
  6. Step 6: Final answer
    x = 54,018.97

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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.