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Finding the Fourth Proportional to 154,728.48, 213,485.34 and 91,054.32

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Solution

The fourth proportional to 154,728.48, 213,485.34 and 91,054.32 is: 125,631.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,728.48 : 213,485.34 = 91,054.32 : x
  2. Step 2: Convert to fraction form
    154,728.48/213,485.34 = 91,054.32/x
  3. Step 3: Cross multiply
    154,728.48x = 213,485.34 × 91,054.32
  4. Step 4: Simplify right side
    154,728.48x = 19,438,762,463.67
  5. Step 5: Solve for x
    x = 19,438,762,463.67/154,728.48
  6. Step 6: Final answer
    x = 125,631.44

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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.