Home / 138,870.02-191,626.93-77,604.90

Finding the Fourth Proportional to 138,870.02, 191,626.93 and 77,604.90

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Solution

The fourth proportional to 138,870.02, 191,626.93 and 77,604.90 is: 107,087.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,870.02 : 191,626.93 = 77,604.90 : x
  2. Step 2: Convert to fraction form
    138,870.02/191,626.93 = 77,604.90/x
  3. Step 3: Cross multiply
    138,870.02x = 191,626.93 × 77,604.90
  4. Step 4: Simplify right side
    138,870.02x = 14,871,188,739.96
  5. Step 5: Solve for x
    x = 14,871,188,739.96/138,870.02
  6. Step 6: Final answer
    x = 107,087.11

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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.