Home / 105,165.14-145,128.11-57,419.28

Finding the Fourth Proportional to 105,165.14, 145,128.11 and 57,419.28

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Solution

The fourth proportional to 105,165.14, 145,128.11 and 57,419.28 is: 79,238.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,165.14 : 145,128.11 = 57,419.28 : x
  2. Step 2: Convert to fraction form
    105,165.14/145,128.11 = 57,419.28/x
  3. Step 3: Cross multiply
    105,165.14x = 145,128.11 × 57,419.28
  4. Step 4: Simplify right side
    105,165.14x = 8,333,151,296.86
  5. Step 5: Solve for x
    x = 8,333,151,296.86/105,165.14
  6. Step 6: Final answer
    x = 79,238.73

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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.