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Finding the Fourth Proportional to 75,079.48, 103,621.31 and 42,814.17

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Solution

The fourth proportional to 75,079.48, 103,621.31 and 42,814.17 is: 59,090.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,079.48 : 103,621.31 = 42,814.17 : x
  2. Step 2: Convert to fraction form
    75,079.48/103,621.31 = 42,814.17/x
  3. Step 3: Cross multiply
    75,079.48x = 103,621.31 × 42,814.17
  4. Step 4: Simplify right side
    75,079.48x = 4,436,460,509.07
  5. Step 5: Solve for x
    x = 4,436,460,509.07/75,079.48
  6. Step 6: Final answer
    x = 59,090.19

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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.