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Finding the Fourth Proportional to 154,064.80, 212,587.92 and 86,078.88

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Solution

The fourth proportional to 154,064.80, 212,587.92 and 86,078.88 is: 118,776.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,064.80 : 212,587.92 = 86,078.88 : x
  2. Step 2: Convert to fraction form
    154,064.80/212,587.92 = 86,078.88/x
  3. Step 3: Cross multiply
    154,064.80x = 212,587.92 × 86,078.88
  4. Step 4: Simplify right side
    154,064.80x = 18,299,330,055.13
  5. Step 5: Solve for x
    x = 18,299,330,055.13/154,064.80
  6. Step 6: Final answer
    x = 118,776.84

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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.