Home / 142,110.10-212,755.55-86,814.10

Finding the Fourth Proportional to 142,110.10, 212,755.55 and 86,814.10

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Solution

The fourth proportional to 142,110.10, 212,755.55 and 86,814.10 is: 129,970.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,110.10 : 212,755.55 = 86,814.10 : x
  2. Step 2: Convert to fraction form
    142,110.10/212,755.55 = 86,814.10/x
  3. Step 3: Cross multiply
    142,110.10x = 212,755.55 × 86,814.10
  4. Step 4: Simplify right side
    142,110.10x = 18,470,181,593.26
  5. Step 5: Solve for x
    x = 18,470,181,593.26/142,110.10
  6. Step 6: Final answer
    x = 129,970.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.