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Finding the Fourth Proportional to 86,187.88, 118,880.80 and 55,919.13

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Solution

The fourth proportional to 86,187.88, 118,880.80 and 55,919.13 is: 77,130.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,187.88 : 118,880.80 = 55,919.13 : x
  2. Step 2: Convert to fraction form
    86,187.88/118,880.80 = 55,919.13/x
  3. Step 3: Cross multiply
    86,187.88x = 118,880.80 × 55,919.13
  4. Step 4: Simplify right side
    86,187.88x = 6,647,710,909.70
  5. Step 5: Solve for x
    x = 6,647,710,909.70/86,187.88
  6. Step 6: Final answer
    x = 77,130.46

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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.