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Finding the Fourth Proportional to 76,935.60, 115,403.40 and 65,660.40

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Solution

The fourth proportional to 76,935.60, 115,403.40 and 65,660.40 is: 98,490.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,935.60 : 115,403.40 = 65,660.40 : x
  2. Step 2: Convert to fraction form
    76,935.60/115,403.40 = 65,660.40/x
  3. Step 3: Cross multiply
    76,935.60x = 115,403.40 × 65,660.40
  4. Step 4: Simplify right side
    76,935.60x = 7,577,433,405.36
  5. Step 5: Solve for x
    x = 7,577,433,405.36/76,935.60
  6. Step 6: Final answer
    x = 98,490.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.