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Finding the Fourth Proportional to 75,168.98, 103,707.43 and 42,880.40

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Solution

The fourth proportional to 75,168.98, 103,707.43 and 42,880.40 is: 59,160.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,168.98 : 103,707.43 = 42,880.40 : x
  2. Step 2: Convert to fraction form
    75,168.98/103,707.43 = 42,880.40/x
  3. Step 3: Cross multiply
    75,168.98x = 103,707.43 × 42,880.40
  4. Step 4: Simplify right side
    75,168.98x = 4,447,016,081.37
  5. Step 5: Solve for x
    x = 4,447,016,081.37/75,168.98
  6. Step 6: Final answer
    x = 59,160.26

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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.