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Finding the Fourth Proportional to 86,693.30, 121,215.10 and 86,693.30

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Solution

The fourth proportional to 86,693.30, 121,215.10 and 86,693.30 is: 121,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,693.30 : 121,215.10 = 86,693.30 : x
  2. Step 2: Convert to fraction form
    86,693.30/121,215.10 = 86,693.30/x
  3. Step 3: Cross multiply
    86,693.30x = 121,215.10 × 86,693.30
  4. Step 4: Simplify right side
    86,693.30x = 10,508,537,028.83
  5. Step 5: Solve for x
    x = 10,508,537,028.83/86,693.30
  6. Step 6: Final answer
    x = 121,215.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.