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Finding the Fourth Proportional to 153,692.60, 212,096.75 and 85,713.89

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Solution

The fourth proportional to 153,692.60, 212,096.75 and 85,713.89 is: 118,285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,692.60 : 212,096.75 = 85,713.89 : x
  2. Step 2: Convert to fraction form
    153,692.60/212,096.75 = 85,713.89/x
  3. Step 3: Cross multiply
    153,692.60x = 212,096.75 × 85,713.89
  4. Step 4: Simplify right side
    153,692.60x = 18,179,636,009.80
  5. Step 5: Solve for x
    x = 18,179,636,009.80/153,692.60
  6. Step 6: Final answer
    x = 118,285.70

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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.