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Finding the Fourth Proportional to 153,999.07, 212,503.71 and 86,010.64

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Solution

The fourth proportional to 153,999.07, 212,503.71 and 86,010.64 is: 118,686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,999.07 : 212,503.71 = 86,010.64 : x
  2. Step 2: Convert to fraction form
    153,999.07/212,503.71 = 86,010.64/x
  3. Step 3: Cross multiply
    153,999.07x = 212,503.71 × 86,010.64
  4. Step 4: Simplify right side
    153,999.07x = 18,277,580,099.47
  5. Step 5: Solve for x
    x = 18,277,580,099.47/153,999.07
  6. Step 6: Final answer
    x = 118,686.30

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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.