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Finding the Fourth Proportional to 131,043.64, 180,840.02 and 77,328.76

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Solution

The fourth proportional to 131,043.64, 180,840.02 and 77,328.76 is: 106,713.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,043.64 : 180,840.02 = 77,328.76 : x
  2. Step 2: Convert to fraction form
    131,043.64/180,840.02 = 77,328.76/x
  3. Step 3: Cross multiply
    131,043.64x = 180,840.02 × 77,328.76
  4. Step 4: Simplify right side
    131,043.64x = 13,984,134,504.98
  5. Step 5: Solve for x
    x = 13,984,134,504.98/131,043.64
  6. Step 6: Final answer
    x = 106,713.57

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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.