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Finding the Fourth Proportional to 153,986.70, 215,056.50 and 153,986.70

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Solution

The fourth proportional to 153,986.70, 215,056.50 and 153,986.70 is: 215,056.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,986.70 : 215,056.50 = 153,986.70 : x
  2. Step 2: Convert to fraction form
    153,986.70/215,056.50 = 153,986.70/x
  3. Step 3: Cross multiply
    153,986.70x = 215,056.50 × 153,986.70
  4. Step 4: Simplify right side
    153,986.70x = 33,115,840,748.55
  5. Step 5: Solve for x
    x = 33,115,840,748.55/153,986.70
  6. Step 6: Final answer
    x = 215,056.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.