Home / 85,748.80-128,571.25-38,355.06

Finding the Fourth Proportional to 85,748.80, 128,571.25 and 38,355.06

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Solution

The fourth proportional to 85,748.80, 128,571.25 and 38,355.06 is: 57,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,748.80 : 128,571.25 = 38,355.06 : x
  2. Step 2: Convert to fraction form
    85,748.80/128,571.25 = 38,355.06/x
  3. Step 3: Cross multiply
    85,748.80x = 128,571.25 × 38,355.06
  4. Step 4: Simplify right side
    85,748.80x = 4,931,357,562.18
  5. Step 5: Solve for x
    x = 4,931,357,562.18/85,748.80
  6. Step 6: Final answer
    x = 57,509.35

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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.