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Finding the Fourth Proportional to 76,349.39, 105,362.18 and 42,815.39

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Solution

The fourth proportional to 76,349.39, 105,362.18 and 42,815.39 is: 59,085.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,349.39 : 105,362.18 = 42,815.39 : x
  2. Step 2: Convert to fraction form
    76,349.39/105,362.18 = 42,815.39/x
  3. Step 3: Cross multiply
    76,349.39x = 105,362.18 × 42,815.39
  4. Step 4: Simplify right side
    76,349.39x = 4,511,122,827.95
  5. Step 5: Solve for x
    x = 4,511,122,827.95/76,349.39
  6. Step 6: Final answer
    x = 59,085.25

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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.