Home / 78,832.20-118,248.30-72,870.60

Finding the Fourth Proportional to 78,832.20, 118,248.30 and 72,870.60

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Solution

The fourth proportional to 78,832.20, 118,248.30 and 72,870.60 is: 109,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,832.20 : 118,248.30 = 72,870.60 : x
  2. Step 2: Convert to fraction form
    78,832.20/118,248.30 = 72,870.60/x
  3. Step 3: Cross multiply
    78,832.20x = 118,248.30 × 72,870.60
  4. Step 4: Simplify right side
    78,832.20x = 8,616,824,569.98
  5. Step 5: Solve for x
    x = 8,616,824,569.98/78,832.20
  6. Step 6: Final answer
    x = 109,305.90

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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.