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Finding the Fourth Proportional to 156,235.64, 215,608.80 and 91,723.16

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Solution

The fourth proportional to 156,235.64, 215,608.80 and 91,723.16 is: 126,580.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,235.64 : 215,608.80 = 91,723.16 : x
  2. Step 2: Convert to fraction form
    156,235.64/215,608.80 = 91,723.16/x
  3. Step 3: Cross multiply
    156,235.64x = 215,608.80 × 91,723.16
  4. Step 4: Simplify right side
    156,235.64x = 19,776,320,459.81
  5. Step 5: Solve for x
    x = 19,776,320,459.81/156,235.64
  6. Step 6: Final answer
    x = 126,580.08

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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.