Home / 138,089.09-190,543.23-77,657.42

Finding the Fourth Proportional to 138,089.09, 190,543.23 and 77,657.42

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Solution

The fourth proportional to 138,089.09, 190,543.23 and 77,657.42 is: 107,156.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,089.09 : 190,543.23 = 77,657.42 : x
  2. Step 2: Convert to fraction form
    138,089.09/190,543.23 = 77,657.42/x
  3. Step 3: Cross multiply
    138,089.09x = 190,543.23 × 77,657.42
  4. Step 4: Simplify right side
    138,089.09x = 14,797,094,687.55
  5. Step 5: Solve for x
    x = 14,797,094,687.55/138,089.09
  6. Step 6: Final answer
    x = 107,156.15

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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.