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Finding the Fourth Proportional to 86,488.93, 129,749.08 and 39,126.34

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Solution

The fourth proportional to 86,488.93, 129,749.08 and 39,126.34 is: 58,696.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,488.93 : 129,749.08 = 39,126.34 : x
  2. Step 2: Convert to fraction form
    86,488.93/129,749.08 = 39,126.34/x
  3. Step 3: Cross multiply
    86,488.93x = 129,749.08 × 39,126.34
  4. Step 4: Simplify right side
    86,488.93x = 5,076,606,618.77
  5. Step 5: Solve for x
    x = 5,076,606,618.77/86,488.93
  6. Step 6: Final answer
    x = 58,696.61

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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.