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Finding the Fourth Proportional to 153,901.03, 212,394.15 and 85,931.38

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Solution

The fourth proportional to 153,901.03, 212,394.15 and 85,931.38 is: 118,591.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,901.03 : 212,394.15 = 85,931.38 : x
  2. Step 2: Convert to fraction form
    153,901.03/212,394.15 = 85,931.38/x
  3. Step 3: Cross multiply
    153,901.03x = 212,394.15 × 85,931.38
  4. Step 4: Simplify right side
    153,901.03x = 18,251,322,413.43
  5. Step 5: Solve for x
    x = 18,251,322,413.43/153,901.03
  6. Step 6: Final answer
    x = 118,591.29

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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.