Home / 78,427.39-117,631.36-46,425.50

Finding the Fourth Proportional to 78,427.39, 117,631.36 and 46,425.50

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Solution

The fourth proportional to 78,427.39, 117,631.36 and 46,425.50 is: 69,632.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,427.39 : 117,631.36 = 46,425.50 : x
  2. Step 2: Convert to fraction form
    78,427.39/117,631.36 = 46,425.50/x
  3. Step 3: Cross multiply
    78,427.39x = 117,631.36 × 46,425.50
  4. Step 4: Simplify right side
    78,427.39x = 5,461,094,471.55
  5. Step 5: Solve for x
    x = 5,461,094,471.55/78,427.39
  6. Step 6: Final answer
    x = 69,632.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.