Home / 78,415.21-108,212.81-42,605.36

Finding the Fourth Proportional to 78,415.21, 108,212.81 and 42,605.36

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Solution

The fourth proportional to 78,415.21, 108,212.81 and 42,605.36 is: 58,795.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,415.21 : 108,212.81 = 42,605.36 : x
  2. Step 2: Convert to fraction form
    78,415.21/108,212.81 = 42,605.36/x
  3. Step 3: Cross multiply
    78,415.21x = 108,212.81 × 42,605.36
  4. Step 4: Simplify right side
    78,415.21x = 4,610,445,618.02
  5. Step 5: Solve for x
    x = 4,610,445,618.02/78,415.21
  6. Step 6: Final answer
    x = 58,795.30

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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.