Home / 85,831.13-128,776.94-38,442.35

Finding the Fourth Proportional to 85,831.13, 128,776.94 and 38,442.35

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Solution

The fourth proportional to 85,831.13, 128,776.94 and 38,442.35 is: 57,677.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,831.13 : 128,776.94 = 38,442.35 : x
  2. Step 2: Convert to fraction form
    85,831.13/128,776.94 = 38,442.35/x
  3. Step 3: Cross multiply
    85,831.13x = 128,776.94 × 38,442.35
  4. Step 4: Simplify right side
    85,831.13x = 4,950,487,363.31
  5. Step 5: Solve for x
    x = 4,950,487,363.31/85,831.13
  6. Step 6: Final answer
    x = 57,677.06

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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.