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Finding the Fourth Proportional to 98,014.80, 135,290.88 and 77,907.36

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Solution

The fourth proportional to 98,014.80, 135,290.88 and 77,907.36 is: 107,536.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,014.80 : 135,290.88 = 77,907.36 : x
  2. Step 2: Convert to fraction form
    98,014.80/135,290.88 = 77,907.36/x
  3. Step 3: Cross multiply
    98,014.80x = 135,290.88 × 77,907.36
  4. Step 4: Simplify right side
    98,014.80x = 10,540,155,292.88
  5. Step 5: Solve for x
    x = 10,540,155,292.88/98,014.80
  6. Step 6: Final answer
    x = 107,536.36

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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.