Home / 78,386.08-117,542.52-28,459.84

Finding the Fourth Proportional to 78,386.08, 117,542.52 and 28,459.84

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Solution

The fourth proportional to 78,386.08, 117,542.52 and 28,459.84 is: 42,676.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,386.08 : 117,542.52 = 28,459.84 : x
  2. Step 2: Convert to fraction form
    78,386.08/117,542.52 = 28,459.84/x
  3. Step 3: Cross multiply
    78,386.08x = 117,542.52 × 28,459.84
  4. Step 4: Simplify right side
    78,386.08x = 3,345,241,312.40
  5. Step 5: Solve for x
    x = 3,345,241,312.40/78,386.08
  6. Step 6: Final answer
    x = 42,676.47

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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.