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Finding the Fourth Proportional to 78,593.40, 108,455.58 and 42,782.67

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Solution

The fourth proportional to 78,593.40, 108,455.58 and 42,782.67 is: 59,038.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,593.40 : 108,455.58 = 42,782.67 : x
  2. Step 2: Convert to fraction form
    78,593.40/108,455.58 = 42,782.67/x
  3. Step 3: Cross multiply
    78,593.40x = 108,455.58 × 42,782.67
  4. Step 4: Simplify right side
    78,593.40x = 4,640,019,288.80
  5. Step 5: Solve for x
    x = 4,640,019,288.80/78,593.40
  6. Step 6: Final answer
    x = 59,038.28

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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.