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Finding the Fourth Proportional to 86,070.39, 129,120.16 and 26,894.42

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Solution

The fourth proportional to 86,070.39, 129,120.16 and 26,894.42 is: 40,346.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,070.39 : 129,120.16 = 26,894.42 : x
  2. Step 2: Convert to fraction form
    86,070.39/129,120.16 = 26,894.42/x
  3. Step 3: Cross multiply
    86,070.39x = 129,120.16 × 26,894.42
  4. Step 4: Simplify right side
    86,070.39x = 3,472,611,813.51
  5. Step 5: Solve for x
    x = 3,472,611,813.51/86,070.39
  6. Step 6: Final answer
    x = 40,346.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.