Home / 102,991.75-142,130.78-58,279.75

Finding the Fourth Proportional to 102,991.75, 142,130.78 and 58,279.75

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Solution

The fourth proportional to 102,991.75, 142,130.78 and 58,279.75 is: 80,427.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,991.75 : 142,130.78 = 58,279.75 : x
  2. Step 2: Convert to fraction form
    102,991.75/142,130.78 = 58,279.75/x
  3. Step 3: Cross multiply
    102,991.75x = 142,130.78 × 58,279.75
  4. Step 4: Simplify right side
    102,991.75x = 8,283,346,325.71
  5. Step 5: Solve for x
    x = 8,283,346,325.71/102,991.75
  6. Step 6: Final answer
    x = 80,427.28

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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.