Home / 153,964.47-212,466.83-85,979.55

Finding the Fourth Proportional to 153,964.47, 212,466.83 and 85,979.55

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Solution

The fourth proportional to 153,964.47, 212,466.83 and 85,979.55 is: 118,649.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,964.47 : 212,466.83 = 85,979.55 : x
  2. Step 2: Convert to fraction form
    153,964.47/212,466.83 = 85,979.55/x
  3. Step 3: Cross multiply
    153,964.47x = 212,466.83 × 85,979.55
  4. Step 4: Simplify right side
    153,964.47x = 18,267,802,003.43
  5. Step 5: Solve for x
    x = 18,267,802,003.43/153,964.47
  6. Step 6: Final answer
    x = 118,649.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.