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Finding the Fourth Proportional to 86,298.76, 119,063.82 and 70,355.80

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Solution

The fourth proportional to 86,298.76, 119,063.82 and 70,355.80 is: 97,067.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,298.76 : 119,063.82 = 70,355.80 : x
  2. Step 2: Convert to fraction form
    86,298.76/119,063.82 = 70,355.80/x
  3. Step 3: Cross multiply
    86,298.76x = 119,063.82 × 70,355.80
  4. Step 4: Simplify right side
    86,298.76x = 8,376,830,307.16
  5. Step 5: Solve for x
    x = 8,376,830,307.16/86,298.76
  6. Step 6: Final answer
    x = 97,067.79

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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.