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Finding the Fourth Proportional to 86,119.98, 118,710.27 and 78,888.30

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Solution

The fourth proportional to 86,119.98, 118,710.27 and 78,888.30 is: 108,741.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,119.98 : 118,710.27 = 78,888.30 : x
  2. Step 2: Convert to fraction form
    86,119.98/118,710.27 = 78,888.30/x
  3. Step 3: Cross multiply
    86,119.98x = 118,710.27 × 78,888.30
  4. Step 4: Simplify right side
    86,119.98x = 9,364,851,392.84
  5. Step 5: Solve for x
    x = 9,364,851,392.84/86,119.98
  6. Step 6: Final answer
    x = 108,741.91

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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.