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Finding the Fourth Proportional to 153,820.87, 212,272.40 and 85,837.13

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Solution

The fourth proportional to 153,820.87, 212,272.40 and 85,837.13 is: 118,455.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,820.87 : 212,272.40 = 85,837.13 : x
  2. Step 2: Convert to fraction form
    153,820.87/212,272.40 = 85,837.13/x
  3. Step 3: Cross multiply
    153,820.87x = 212,272.40 × 85,837.13
  4. Step 4: Simplify right side
    153,820.87x = 18,220,852,532.85
  5. Step 5: Solve for x
    x = 18,220,852,532.85/153,820.87
  6. Step 6: Final answer
    x = 118,455.01

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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.