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Finding the Fourth Proportional to 70,783.80, 97,663.98 and 45,603

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Solution

The fourth proportional to 70,783.80, 97,663.98 and 45,603 is: 62,920.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,783.80 : 97,663.98 = 45,603 : x
  2. Step 2: Convert to fraction form
    70,783.80/97,663.98 = 45,603/x
  3. Step 3: Cross multiply
    70,783.80x = 97,663.98 × 45,603
  4. Step 4: Simplify right side
    70,783.80x = 4,453,770,479.94
  5. Step 5: Solve for x
    x = 4,453,770,479.94/70,783.80
  6. Step 6: Final answer
    x = 62,920.76

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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.