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Finding the Fourth Proportional to 102,390.87, 141,300.06 and 57,071.73

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Solution

The fourth proportional to 102,390.87, 141,300.06 and 57,071.73 is: 78,759.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,390.87 : 141,300.06 = 57,071.73 : x
  2. Step 2: Convert to fraction form
    102,390.87/141,300.06 = 57,071.73/x
  3. Step 3: Cross multiply
    102,390.87x = 141,300.06 × 57,071.73
  4. Step 4: Simplify right side
    102,390.87x = 8,064,238,873.30
  5. Step 5: Solve for x
    x = 8,064,238,873.30/102,390.87
  6. Step 6: Final answer
    x = 78,759.35

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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.