Home / 86,376.32-129,362.88-66,497.12

Finding the Fourth Proportional to 86,376.32, 129,362.88 and 66,497.12

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Solution

The fourth proportional to 86,376.32, 129,362.88 and 66,497.12 is: 99,590.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,376.32 : 129,362.88 = 66,497.12 : x
  2. Step 2: Convert to fraction form
    86,376.32/129,362.88 = 66,497.12/x
  3. Step 3: Cross multiply
    86,376.32x = 129,362.88 × 66,497.12
  4. Step 4: Simplify right side
    86,376.32x = 8,602,258,954.91
  5. Step 5: Solve for x
    x = 8,602,258,954.91/86,376.32
  6. Step 6: Final answer
    x = 99,590.48

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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.