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Finding the Fourth Proportional to 76,645.17, 105,768.16 and 42,653.11

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Solution

The fourth proportional to 76,645.17, 105,768.16 and 42,653.11 is: 58,860.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,645.17 : 105,768.16 = 42,653.11 : x
  2. Step 2: Convert to fraction form
    76,645.17/105,768.16 = 42,653.11/x
  3. Step 3: Cross multiply
    76,645.17x = 105,768.16 × 42,653.11
  4. Step 4: Simplify right side
    76,645.17x = 4,511,340,962.98
  5. Step 5: Solve for x
    x = 4,511,340,962.98/76,645.17
  6. Step 6: Final answer
    x = 58,860.08

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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.