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Finding the Fourth Proportional to 75,312.56, 103,931.16 and 43,480.64

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Solution

The fourth proportional to 75,312.56, 103,931.16 and 43,480.64 is: 60,003.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,312.56 : 103,931.16 = 43,480.64 : x
  2. Step 2: Convert to fraction form
    75,312.56/103,931.16 = 43,480.64/x
  3. Step 3: Cross multiply
    75,312.56x = 103,931.16 × 43,480.64
  4. Step 4: Simplify right side
    75,312.56x = 4,518,993,352.74
  5. Step 5: Solve for x
    x = 4,518,993,352.74/75,312.56
  6. Step 6: Final answer
    x = 60,003.18

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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.