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Finding the Fourth Proportional to 74,818.16, 103,250.16 and 40,828.40

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Solution

The fourth proportional to 74,818.16, 103,250.16 and 40,828.40 is: 56,343.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,818.16 : 103,250.16 = 40,828.40 : x
  2. Step 2: Convert to fraction form
    74,818.16/103,250.16 = 40,828.40/x
  3. Step 3: Cross multiply
    74,818.16x = 103,250.16 × 40,828.40
  4. Step 4: Simplify right side
    74,818.16x = 4,215,538,832.54
  5. Step 5: Solve for x
    x = 4,215,538,832.54/74,818.16
  6. Step 6: Final answer
    x = 56,343.79

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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.