Home / 85,787.02-128,628.59-38,393.29

Finding the Fourth Proportional to 85,787.02, 128,628.59 and 38,393.29

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Solution

The fourth proportional to 85,787.02, 128,628.59 and 38,393.29 is: 57,566.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,787.02 : 128,628.59 = 38,393.29 : x
  2. Step 2: Convert to fraction form
    85,787.02/128,628.59 = 38,393.29/x
  3. Step 3: Cross multiply
    85,787.02x = 128,628.59 × 38,393.29
  4. Step 4: Simplify right side
    85,787.02x = 4,938,474,758.16
  5. Step 5: Solve for x
    x = 4,938,474,758.16/85,787.02
  6. Step 6: Final answer
    x = 57,566.69

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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.