Home / 78,495.19-118,266.22-71,007.45

Finding the Fourth Proportional to 78,495.19, 118,266.22 and 71,007.45

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Solution

The fourth proportional to 78,495.19, 118,266.22 and 71,007.45 is: 106,984.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,495.19 : 118,266.22 = 71,007.45 : x
  2. Step 2: Convert to fraction form
    78,495.19/118,266.22 = 71,007.45/x
  3. Step 3: Cross multiply
    78,495.19x = 118,266.22 × 71,007.45
  4. Step 4: Simplify right side
    78,495.19x = 8,397,782,348.60
  5. Step 5: Solve for x
    x = 8,397,782,348.60/78,495.19
  6. Step 6: Final answer
    x = 106,984.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.