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Finding the Fourth Proportional to 76,645.95, 105,680.94 and 52,458.58

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Solution

The fourth proportional to 76,645.95, 105,680.94 and 52,458.58 is: 72,330.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,645.95 : 105,680.94 = 52,458.58 : x
  2. Step 2: Convert to fraction form
    76,645.95/105,680.94 = 52,458.58/x
  3. Step 3: Cross multiply
    76,645.95x = 105,680.94 × 52,458.58
  4. Step 4: Simplify right side
    76,645.95x = 5,543,872,045.47
  5. Step 5: Solve for x
    x = 5,543,872,045.47/76,645.95
  6. Step 6: Final answer
    x = 72,330.92

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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.