Home / 78,278.21-108,024.15-42,468.51

Finding the Fourth Proportional to 78,278.21, 108,024.15 and 42,468.51

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Solution

The fourth proportional to 78,278.21, 108,024.15 and 42,468.51 is: 58,606.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,278.21 : 108,024.15 = 42,468.51 : x
  2. Step 2: Convert to fraction form
    78,278.21/108,024.15 = 42,468.51/x
  3. Step 3: Cross multiply
    78,278.21x = 108,024.15 × 42,468.51
  4. Step 4: Simplify right side
    78,278.21x = 4,587,624,853.77
  5. Step 5: Solve for x
    x = 4,587,624,853.77/78,278.21
  6. Step 6: Final answer
    x = 58,606.67

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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.