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Finding the Fourth Proportional to 76,597.70, 105,703.30 and 42,605.47

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Solution

The fourth proportional to 76,597.70, 105,703.30 and 42,605.47 is: 58,794.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,597.70 : 105,703.30 = 42,605.47 : x
  2. Step 2: Convert to fraction form
    76,597.70/105,703.30 = 42,605.47/x
  3. Step 3: Cross multiply
    76,597.70x = 105,703.30 × 42,605.47
  4. Step 4: Simplify right side
    76,597.70x = 4,503,538,035.51
  5. Step 5: Solve for x
    x = 4,503,538,035.51/76,597.70
  6. Step 6: Final answer
    x = 58,794.69

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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.