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Finding the Fourth Proportional to 76,449, 105,499.68 and 42,925.80

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Solution

The fourth proportional to 76,449, 105,499.68 and 42,925.80 is: 59,237.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,449 : 105,499.68 = 42,925.80 : x
  2. Step 2: Convert to fraction form
    76,449/105,499.68 = 42,925.80/x
  3. Step 3: Cross multiply
    76,449x = 105,499.68 × 42,925.80
  4. Step 4: Simplify right side
    76,449x = 4,528,658,163.74
  5. Step 5: Solve for x
    x = 4,528,658,163.74/76,449
  6. Step 6: Final answer
    x = 59,237.64

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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.