Home / 105,288.16-145,289.80-57,531.28

Finding the Fourth Proportional to 105,288.16, 145,289.80 and 57,531.28

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Solution

The fourth proportional to 105,288.16, 145,289.80 and 57,531.28 is: 79,388.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,288.16 : 145,289.80 = 57,531.28 : x
  2. Step 2: Convert to fraction form
    105,288.16/145,289.80 = 57,531.28/x
  3. Step 3: Cross multiply
    105,288.16x = 145,289.80 × 57,531.28
  4. Step 4: Simplify right side
    105,288.16x = 8,358,708,164.94
  5. Step 5: Solve for x
    x = 8,358,708,164.94/105,288.16
  6. Step 6: Final answer
    x = 79,388.87

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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.