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Finding the Fourth Proportional to 153,800.47, 212,244.40 and 85,813.32

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Solution

The fourth proportional to 153,800.47, 212,244.40 and 85,813.32 is: 118,422.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,800.47 : 212,244.40 = 85,813.32 : x
  2. Step 2: Convert to fraction form
    153,800.47/212,244.40 = 85,813.32/x
  3. Step 3: Cross multiply
    153,800.47x = 212,244.40 × 85,813.32
  4. Step 4: Simplify right side
    153,800.47x = 18,213,397,518.59
  5. Step 5: Solve for x
    x = 18,213,397,518.59/153,800.47
  6. Step 6: Final answer
    x = 118,422.25

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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.