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Finding the Fourth Proportional to 58,278, 87,409.44 and 18,831.12

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Solution

The fourth proportional to 58,278, 87,409.44 and 18,831.12 is: 28,244.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,278 : 87,409.44 = 18,831.12 : x
  2. Step 2: Convert to fraction form
    58,278/87,409.44 = 18,831.12/x
  3. Step 3: Cross multiply
    58,278x = 87,409.44 × 18,831.12
  4. Step 4: Simplify right side
    58,278x = 1,646,017,653.77
  5. Step 5: Solve for x
    x = 1,646,017,653.77/58,278
  6. Step 6: Final answer
    x = 28,244.24

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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.