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Finding the Fourth Proportional to 86,603, 129,947.55 and 48,628.64

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Solution

The fourth proportional to 86,603, 129,947.55 and 48,628.64 is: 72,967.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,603 : 129,947.55 = 48,628.64 : x
  2. Step 2: Convert to fraction form
    86,603/129,947.55 = 48,628.64/x
  3. Step 3: Cross multiply
    86,603x = 129,947.55 × 48,628.64
  4. Step 4: Simplify right side
    86,603x = 6,319,172,627.83
  5. Step 5: Solve for x
    x = 6,319,172,627.83/86,603
  6. Step 6: Final answer
    x = 72,967.13

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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.