Home / 105,585.40-145,707.88-57,840.46

Finding the Fourth Proportional to 105,585.40, 145,707.88 and 57,840.46

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Solution

The fourth proportional to 105,585.40, 145,707.88 and 57,840.46 is: 79,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,585.40 : 145,707.88 = 57,840.46 : x
  2. Step 2: Convert to fraction form
    105,585.40/145,707.88 = 57,840.46/x
  3. Step 3: Cross multiply
    105,585.40x = 145,707.88 × 57,840.46
  4. Step 4: Simplify right side
    105,585.40x = 8,427,810,804.82
  5. Step 5: Solve for x
    x = 8,427,810,804.82/105,585.40
  6. Step 6: Final answer
    x = 79,819.85

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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.