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Finding the Fourth Proportional to 153,672.85, 212,071.16 and 84,770.23

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Solution

The fourth proportional to 153,672.85, 212,071.16 and 84,770.23 is: 116,984.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,672.85 : 212,071.16 = 84,770.23 : x
  2. Step 2: Convert to fraction form
    153,672.85/212,071.16 = 84,770.23/x
  3. Step 3: Cross multiply
    153,672.85x = 212,071.16 × 84,770.23
  4. Step 4: Simplify right side
    153,672.85x = 17,977,321,009.57
  5. Step 5: Solve for x
    x = 17,977,321,009.57/153,672.85
  6. Step 6: Final answer
    x = 116,984.37

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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.