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Finding the Fourth Proportional to 154,700.94, 213,485.58 and 86,728.98

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Solution

The fourth proportional to 154,700.94, 213,485.58 and 86,728.98 is: 119,685.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,700.94 : 213,485.58 = 86,728.98 : x
  2. Step 2: Convert to fraction form
    154,700.94/213,485.58 = 86,728.98/x
  3. Step 3: Cross multiply
    154,700.94x = 213,485.58 × 86,728.98
  4. Step 4: Simplify right side
    154,700.94x = 18,515,386,598.11
  5. Step 5: Solve for x
    x = 18,515,386,598.11/154,700.94
  6. Step 6: Final answer
    x = 119,685.03

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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.