Home / 131,507.40-197,261.10-81,643.80

Finding the Fourth Proportional to 131,507.40, 197,261.10 and 81,643.80

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Solution

The fourth proportional to 131,507.40, 197,261.10 and 81,643.80 is: 122,465.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,507.40 : 197,261.10 = 81,643.80 : x
  2. Step 2: Convert to fraction form
    131,507.40/197,261.10 = 81,643.80/x
  3. Step 3: Cross multiply
    131,507.40x = 197,261.10 × 81,643.80
  4. Step 4: Simplify right side
    131,507.40x = 16,105,145,796.18
  5. Step 5: Solve for x
    x = 16,105,145,796.18/131,507.40
  6. Step 6: Final answer
    x = 122,465.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.