Home / 85,970.12-128,773.35-54,363.87

Finding the Fourth Proportional to 85,970.12, 128,773.35 and 54,363.87

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Solution

The fourth proportional to 85,970.12, 128,773.35 and 54,363.87 is: 81,430.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,970.12 : 128,773.35 = 54,363.87 : x
  2. Step 2: Convert to fraction form
    85,970.12/128,773.35 = 54,363.87/x
  3. Step 3: Cross multiply
    85,970.12x = 128,773.35 × 54,363.87
  4. Step 4: Simplify right side
    85,970.12x = 7,000,617,658.86
  5. Step 5: Solve for x
    x = 7,000,617,658.86/85,970.12
  6. Step 6: Final answer
    x = 81,430.83

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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.