Home / 78,530.41-108,373.26-42,720.45

Finding the Fourth Proportional to 78,530.41, 108,373.26 and 42,720.45

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Solution

The fourth proportional to 78,530.41, 108,373.26 and 42,720.45 is: 58,954.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,530.41 : 108,373.26 = 42,720.45 : x
  2. Step 2: Convert to fraction form
    78,530.41/108,373.26 = 42,720.45/x
  3. Step 3: Cross multiply
    78,530.41x = 108,373.26 × 42,720.45
  4. Step 4: Simplify right side
    78,530.41x = 4,629,754,435.17
  5. Step 5: Solve for x
    x = 4,629,754,435.17/78,530.41
  6. Step 6: Final answer
    x = 58,954.93

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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.