Home / 78,402.90-117,570.33-28,466.40

Finding the Fourth Proportional to 78,402.90, 117,570.33 and 28,466.40

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Solution

The fourth proportional to 78,402.90, 117,570.33 and 28,466.40 is: 42,687.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,402.90 : 117,570.33 = 28,466.40 : x
  2. Step 2: Convert to fraction form
    78,402.90/117,570.33 = 28,466.40/x
  3. Step 3: Cross multiply
    78,402.90x = 117,570.33 × 28,466.40
  4. Step 4: Simplify right side
    78,402.90x = 3,346,804,041.91
  5. Step 5: Solve for x
    x = 3,346,804,041.91/78,402.90
  6. Step 6: Final answer
    x = 42,687.25

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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.