Home / 85,719.10-128,590.70-35,787.84

Finding the Fourth Proportional to 85,719.10, 128,590.70 and 35,787.84

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Solution

The fourth proportional to 85,719.10, 128,590.70 and 35,787.84 is: 53,686.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,719.10 : 128,590.70 = 35,787.84 : x
  2. Step 2: Convert to fraction form
    85,719.10/128,590.70 = 35,787.84/x
  3. Step 3: Cross multiply
    85,719.10x = 128,590.70 × 35,787.84
  4. Step 4: Simplify right side
    85,719.10x = 4,601,983,168.40
  5. Step 5: Solve for x
    x = 4,601,983,168.40/85,719.10
  6. Step 6: Final answer
    x = 53,686.79

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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.