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Finding the Fourth Proportional to 78,693.63, 108,597.21 and 42,883.67

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Solution

The fourth proportional to 78,693.63, 108,597.21 and 42,883.67 is: 59,179.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,693.63 : 108,597.21 = 42,883.67 : x
  2. Step 2: Convert to fraction form
    78,693.63/108,597.21 = 42,883.67/x
  3. Step 3: Cross multiply
    78,693.63x = 108,597.21 × 42,883.67
  4. Step 4: Simplify right side
    78,693.63x = 4,657,047,188.05
  5. Step 5: Solve for x
    x = 4,657,047,188.05/78,693.63
  6. Step 6: Final answer
    x = 59,179.47

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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.