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Finding the Fourth Proportional to 115,928.64, 159,968.40 and 64,934.40

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Solution

The fourth proportional to 115,928.64, 159,968.40 and 64,934.40 is: 89,602.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,928.64 : 159,968.40 = 64,934.40 : x
  2. Step 2: Convert to fraction form
    115,928.64/159,968.40 = 64,934.40/x
  3. Step 3: Cross multiply
    115,928.64x = 159,968.40 × 64,934.40
  4. Step 4: Simplify right side
    115,928.64x = 10,387,452,072.96
  5. Step 5: Solve for x
    x = 10,387,452,072.96/115,928.64
  6. Step 6: Final answer
    x = 89,602.12

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1.5x scale

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.