Home / 139,130.09-191,999.54-78,699.44

Finding the Fourth Proportional to 139,130.09, 191,999.54 and 78,699.44

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Solution

The fourth proportional to 139,130.09, 191,999.54 and 78,699.44 is: 108,605.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,130.09 : 191,999.54 = 78,699.44 : x
  2. Step 2: Convert to fraction form
    139,130.09/191,999.54 = 78,699.44/x
  3. Step 3: Cross multiply
    139,130.09x = 191,999.54 × 78,699.44
  4. Step 4: Simplify right side
    139,130.09x = 15,110,256,278.26
  5. Step 5: Solve for x
    x = 15,110,256,278.26/139,130.09
  6. Step 6: Final answer
    x = 108,605.24

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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.