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Finding the Fourth Proportional to 76,107.90, 105,071.14 and 45,900.91

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Solution

The fourth proportional to 76,107.90, 105,071.14 and 45,900.91 is: 63,368.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,107.90 : 105,071.14 = 45,900.91 : x
  2. Step 2: Convert to fraction form
    76,107.90/105,071.14 = 45,900.91/x
  3. Step 3: Cross multiply
    76,107.90x = 105,071.14 × 45,900.91
  4. Step 4: Simplify right side
    76,107.90x = 4,822,860,825.99
  5. Step 5: Solve for x
    x = 4,822,860,825.99/76,107.90
  6. Step 6: Final answer
    x = 63,368.73

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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.