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Finding the Fourth Proportional to 154,376.88, 213,025.30 and 86,390.34

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Solution

The fourth proportional to 154,376.88, 213,025.30 and 86,390.34 is: 119,210.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,376.88 : 213,025.30 = 86,390.34 : x
  2. Step 2: Convert to fraction form
    154,376.88/213,025.30 = 86,390.34/x
  3. Step 3: Cross multiply
    154,376.88x = 213,025.30 × 86,390.34
  4. Step 4: Simplify right side
    154,376.88x = 18,403,328,095.60
  5. Step 5: Solve for x
    x = 18,403,328,095.60/154,376.88
  6. Step 6: Final answer
    x = 119,210.39

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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.