Home / 78,106.96-117,111.26-66,264.88

Finding the Fourth Proportional to 78,106.96, 117,111.26 and 66,264.88

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Solution

The fourth proportional to 78,106.96, 117,111.26 and 66,264.88 is: 99,355.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,106.96 : 117,111.26 = 66,264.88 : x
  2. Step 2: Convert to fraction form
    78,106.96/117,111.26 = 66,264.88/x
  3. Step 3: Cross multiply
    78,106.96x = 117,111.26 × 66,264.88
  4. Step 4: Simplify right side
    78,106.96x = 7,760,363,590.55
  5. Step 5: Solve for x
    x = 7,760,363,590.55/78,106.96
  6. Step 6: Final answer
    x = 99,355.60

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1.5x scale

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.