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Finding the Fourth Proportional to 153,714.57, 212,127.35 and 85,729.29

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Solution

The fourth proportional to 153,714.57, 212,127.35 and 85,729.29 is: 118,307.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,714.57 : 212,127.35 = 85,729.29 : x
  2. Step 2: Convert to fraction form
    153,714.57/212,127.35 = 85,729.29/x
  3. Step 3: Cross multiply
    153,714.57x = 212,127.35 × 85,729.29
  4. Step 4: Simplify right side
    153,714.57x = 18,185,526,676.44
  5. Step 5: Solve for x
    x = 18,185,526,676.44/153,714.57
  6. Step 6: Final answer
    x = 118,307.11

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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.