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Finding the Fourth Proportional to 86,623.05, 129,934.58 and 86,623.05

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Solution

The fourth proportional to 86,623.05, 129,934.58 and 86,623.05 is: 129,934.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,623.05 : 129,934.58 = 86,623.05 : x
  2. Step 2: Convert to fraction form
    86,623.05/129,934.58 = 86,623.05/x
  3. Step 3: Cross multiply
    86,623.05x = 129,934.58 × 86,623.05
  4. Step 4: Simplify right side
    86,623.05x = 11,255,329,186.95
  5. Step 5: Solve for x
    x = 11,255,329,186.95/86,623.05
  6. Step 6: Final answer
    x = 129,934.58

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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.