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Finding the Fourth Proportional to 153,999.34, 212,516.85 and 86,017.28

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Solution

The fourth proportional to 153,999.34, 212,516.85 and 86,017.28 is: 118,702.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,999.34 : 212,516.85 = 86,017.28 : x
  2. Step 2: Convert to fraction form
    153,999.34/212,516.85 = 86,017.28/x
  3. Step 3: Cross multiply
    153,999.34x = 212,516.85 × 86,017.28
  4. Step 4: Simplify right side
    153,999.34x = 18,280,119,898.50
  5. Step 5: Solve for x
    x = 18,280,119,898.50/153,999.34
  6. Step 6: Final answer
    x = 118,702.59

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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.