Home / 103,837.40-143,289.78-61,409.60

Finding the Fourth Proportional to 103,837.40, 143,289.78 and 61,409.60

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Solution

The fourth proportional to 103,837.40, 143,289.78 and 61,409.60 is: 84,741.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,837.40 : 143,289.78 = 61,409.60 : x
  2. Step 2: Convert to fraction form
    103,837.40/143,289.78 = 61,409.60/x
  3. Step 3: Cross multiply
    103,837.40x = 143,289.78 × 61,409.60
  4. Step 4: Simplify right side
    103,837.40x = 8,799,368,073.89
  5. Step 5: Solve for x
    x = 8,799,368,073.89/103,837.40
  6. Step 6: Final answer
    x = 84,741.80

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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.