Home / 102,390.78-141,299.93-57,071.64

Finding the Fourth Proportional to 102,390.78, 141,299.93 and 57,071.64

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Solution

The fourth proportional to 102,390.78, 141,299.93 and 57,071.64 is: 78,759.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,390.78 : 141,299.93 = 57,071.64 : x
  2. Step 2: Convert to fraction form
    102,390.78/141,299.93 = 57,071.64/x
  3. Step 3: Cross multiply
    102,390.78x = 141,299.93 × 57,071.64
  4. Step 4: Simplify right side
    102,390.78x = 8,064,218,736.99
  5. Step 5: Solve for x
    x = 8,064,218,736.99/102,390.78
  6. Step 6: Final answer
    x = 78,759.23

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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.