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Finding the Fourth Proportional to 139,122.77, 191,987.01 and 75,459.20

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Solution

The fourth proportional to 139,122.77, 191,987.01 and 75,459.20 is: 104,132.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,122.77 : 191,987.01 = 75,459.20 : x
  2. Step 2: Convert to fraction form
    139,122.77/191,987.01 = 75,459.20/x
  3. Step 3: Cross multiply
    139,122.77x = 191,987.01 × 75,459.20
  4. Step 4: Simplify right side
    139,122.77x = 14,487,185,225.06
  5. Step 5: Solve for x
    x = 14,487,185,225.06/139,122.77
  6. Step 6: Final answer
    x = 104,132.38

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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.