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Finding the Fourth Proportional to 78,417.59, 108,216.44 and 42,607.64

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Solution

The fourth proportional to 78,417.59, 108,216.44 and 42,607.64 is: 58,798.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,417.59 : 108,216.44 = 42,607.64 : x
  2. Step 2: Convert to fraction form
    78,417.59/108,216.44 = 42,607.64/x
  3. Step 3: Cross multiply
    78,417.59x = 108,216.44 × 42,607.64
  4. Step 4: Simplify right side
    78,417.59x = 4,610,846,363.48
  5. Step 5: Solve for x
    x = 4,610,846,363.48/78,417.59
  6. Step 6: Final answer
    x = 58,798.63

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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.