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Finding the Fourth Proportional to 115,071.60, 158,784.12 and 64,760.88

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Solution

The fourth proportional to 115,071.60, 158,784.12 and 64,760.88 is: 89,361.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,071.60 : 158,784.12 = 64,760.88 : x
  2. Step 2: Convert to fraction form
    115,071.60/158,784.12 = 64,760.88/x
  3. Step 3: Cross multiply
    115,071.60x = 158,784.12 × 64,760.88
  4. Step 4: Simplify right side
    115,071.60x = 10,282,999,341.23
  5. Step 5: Solve for x
    x = 10,282,999,341.23/115,071.60
  6. Step 6: Final answer
    x = 89,361.75

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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.