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Finding the Fourth Proportional to 76,342.76, 105,352.62 and 42,808.76

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Solution

The fourth proportional to 76,342.76, 105,352.62 and 42,808.76 is: 59,075.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,342.76 : 105,352.62 = 42,808.76 : x
  2. Step 2: Convert to fraction form
    76,342.76/105,352.62 = 42,808.76/x
  3. Step 3: Cross multiply
    76,342.76x = 105,352.62 × 42,808.76
  4. Step 4: Simplify right side
    76,342.76x = 4,510,015,024.95
  5. Step 5: Solve for x
    x = 4,510,015,024.95/76,342.76
  6. Step 6: Final answer
    x = 59,075.87

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Double scale
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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.