Home / 72,582.36-108,831.16-28,157.20

Finding the Fourth Proportional to 72,582.36, 108,831.16 and 28,157.20

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Solution

The fourth proportional to 72,582.36, 108,831.16 and 28,157.20 is: 42,219.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,582.36 : 108,831.16 = 28,157.20 : x
  2. Step 2: Convert to fraction form
    72,582.36/108,831.16 = 28,157.20/x
  3. Step 3: Cross multiply
    72,582.36x = 108,831.16 × 28,157.20
  4. Step 4: Simplify right side
    72,582.36x = 3,064,380,501.47
  5. Step 5: Solve for x
    x = 3,064,380,501.47/72,582.36
  6. Step 6: Final answer
    x = 42,219.36

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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.