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Finding the Fourth Proportional to 86,055.70, 118,756.49 and 47,821.47

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Solution

The fourth proportional to 86,055.70, 118,756.49 and 47,821.47 is: 65,993.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,055.70 : 118,756.49 = 47,821.47 : x
  2. Step 2: Convert to fraction form
    86,055.70/118,756.49 = 47,821.47/x
  3. Step 3: Cross multiply
    86,055.70x = 118,756.49 × 47,821.47
  4. Step 4: Simplify right side
    86,055.70x = 5,679,110,130.07
  5. Step 5: Solve for x
    x = 5,679,110,130.07/86,055.70
  6. Step 6: Final answer
    x = 65,993.42

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1.5x scale

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.