Home / 78,840.30-118,260.45-56,808.30

Finding the Fourth Proportional to 78,840.30, 118,260.45 and 56,808.30

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Solution

The fourth proportional to 78,840.30, 118,260.45 and 56,808.30 is: 85,212.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.30 : 118,260.45 = 56,808.30 : x
  2. Step 2: Convert to fraction form
    78,840.30/118,260.45 = 56,808.30/x
  3. Step 3: Cross multiply
    78,840.30x = 118,260.45 × 56,808.30
  4. Step 4: Simplify right side
    78,840.30x = 6,718,175,121.74
  5. Step 5: Solve for x
    x = 6,718,175,121.74/78,840.30
  6. Step 6: Final answer
    x = 85,212.45

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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.