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Finding the Fourth Proportional to 154,303.52, 212,933.90 and 86,319.03

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Solution

The fourth proportional to 154,303.52, 212,933.90 and 86,319.03 is: 119,117.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,303.52 : 212,933.90 = 86,319.03 : x
  2. Step 2: Convert to fraction form
    154,303.52/212,933.90 = 86,319.03/x
  3. Step 3: Cross multiply
    154,303.52x = 212,933.90 × 86,319.03
  4. Step 4: Simplify right side
    154,303.52x = 18,380,247,696.72
  5. Step 5: Solve for x
    x = 18,380,247,696.72/154,303.52
  6. Step 6: Final answer
    x = 119,117.49

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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.