Home / 105,429.12-145,496.52-57,686.64

Finding the Fourth Proportional to 105,429.12, 145,496.52 and 57,686.64

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Solution

The fourth proportional to 105,429.12, 145,496.52 and 57,686.64 is: 79,609.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,429.12 : 145,496.52 = 57,686.64 : x
  2. Step 2: Convert to fraction form
    105,429.12/145,496.52 = 57,686.64/x
  3. Step 3: Cross multiply
    105,429.12x = 145,496.52 × 57,686.64
  4. Step 4: Simplify right side
    105,429.12x = 8,393,205,370.49
  5. Step 5: Solve for x
    x = 8,393,205,370.49/105,429.12
  6. Step 6: Final answer
    x = 79,609.93

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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.