Home / 78,966.56-108,970.64-43,157.76

Finding the Fourth Proportional to 78,966.56, 108,970.64 and 43,157.76

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Solution

The fourth proportional to 78,966.56, 108,970.64 and 43,157.76 is: 59,555.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,966.56 : 108,970.64 = 43,157.76 : x
  2. Step 2: Convert to fraction form
    78,966.56/108,970.64 = 43,157.76/x
  3. Step 3: Cross multiply
    78,966.56x = 108,970.64 × 43,157.76
  4. Step 4: Simplify right side
    78,966.56x = 4,702,928,728.17
  5. Step 5: Solve for x
    x = 4,702,928,728.17/78,966.56
  6. Step 6: Final answer
    x = 59,555.95

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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.