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Finding the Fourth Proportional to 86,643.55, 129,983.55 and 49,220.94

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Solution

The fourth proportional to 86,643.55, 129,983.55 and 49,220.94 is: 73,841.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,643.55 : 129,983.55 = 49,220.94 : x
  2. Step 2: Convert to fraction form
    86,643.55/129,983.55 = 49,220.94/x
  3. Step 3: Cross multiply
    86,643.55x = 129,983.55 × 49,220.94
  4. Step 4: Simplify right side
    86,643.55x = 6,397,913,095.26
  5. Step 5: Solve for x
    x = 6,397,913,095.26/86,643.55
  6. Step 6: Final answer
    x = 73,841.77

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1.5x scale

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.