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Finding the Fourth Proportional to 76,524.57, 105,603.35 and 42,990.57

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Solution

The fourth proportional to 76,524.57, 105,603.35 and 42,990.57 is: 59,326.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,524.57 : 105,603.35 = 42,990.57 : x
  2. Step 2: Convert to fraction form
    76,524.57/105,603.35 = 42,990.57/x
  3. Step 3: Cross multiply
    76,524.57x = 105,603.35 × 42,990.57
  4. Step 4: Simplify right side
    76,524.57x = 4,539,947,995.46
  5. Step 5: Solve for x
    x = 4,539,947,995.46/76,524.57
  6. Step 6: Final answer
    x = 59,326.67

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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.