Home / 56,831.16-78,432.30-31,680.12

Finding the Fourth Proportional to 56,831.16, 78,432.30 and 31,680.12

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Solution

The fourth proportional to 56,831.16, 78,432.30 and 31,680.12 is: 43,721.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,831.16 : 78,432.30 = 31,680.12 : x
  2. Step 2: Convert to fraction form
    56,831.16/78,432.30 = 31,680.12/x
  3. Step 3: Cross multiply
    56,831.16x = 78,432.30 × 31,680.12
  4. Step 4: Simplify right side
    56,831.16x = 2,484,744,675.88
  5. Step 5: Solve for x
    x = 2,484,744,675.88/56,831.16
  6. Step 6: Final answer
    x = 43,721.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.