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Finding the Fourth Proportional to 153,728.67, 212,145.86 and 85,750.05

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Solution

The fourth proportional to 153,728.67, 212,145.86 and 85,750.05 is: 118,335.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,728.67 : 212,145.86 = 85,750.05 : x
  2. Step 2: Convert to fraction form
    153,728.67/212,145.86 = 85,750.05/x
  3. Step 3: Cross multiply
    153,728.67x = 212,145.86 × 85,750.05
  4. Step 4: Simplify right side
    153,728.67x = 18,191,518,102.29
  5. Step 5: Solve for x
    x = 18,191,518,102.29/153,728.67
  6. Step 6: Final answer
    x = 118,335.23

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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.