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Finding the Fourth Proportional to 92,987.80, 128,323.04 and 55,262.05

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Solution

The fourth proportional to 92,987.80, 128,323.04 and 55,262.05 is: 76,261.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,987.80 : 128,323.04 = 55,262.05 : x
  2. Step 2: Convert to fraction form
    92,987.80/128,323.04 = 55,262.05/x
  3. Step 3: Cross multiply
    92,987.80x = 128,323.04 × 55,262.05
  4. Step 4: Simplify right side
    92,987.80x = 7,091,393,655.51
  5. Step 5: Solve for x
    x = 7,091,393,655.51/92,987.80
  6. Step 6: Final answer
    x = 76,261.55

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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.