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Finding the Fourth Proportional to 131,642.40, 197,463.60 and 75,655.20

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Solution

The fourth proportional to 131,642.40, 197,463.60 and 75,655.20 is: 113,482.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,642.40 : 197,463.60 = 75,655.20 : x
  2. Step 2: Convert to fraction form
    131,642.40/197,463.60 = 75,655.20/x
  3. Step 3: Cross multiply
    131,642.40x = 197,463.60 × 75,655.20
  4. Step 4: Simplify right side
    131,642.40x = 14,939,148,150.72
  5. Step 5: Solve for x
    x = 14,939,148,150.72/131,642.40
  6. Step 6: Final answer
    x = 113,482.80

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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.