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Finding the Fourth Proportional to 153,960.90, 212,461.89 and 85,975.98

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Solution

The fourth proportional to 153,960.90, 212,461.89 and 85,975.98 is: 118,644.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,960.90 : 212,461.89 = 85,975.98 : x
  2. Step 2: Convert to fraction form
    153,960.90/212,461.89 = 85,975.98/x
  3. Step 3: Cross multiply
    153,960.90x = 212,461.89 × 85,975.98
  4. Step 4: Simplify right side
    153,960.90x = 18,266,619,205.40
  5. Step 5: Solve for x
    x = 18,266,619,205.40/153,960.90
  6. Step 6: Final answer
    x = 118,644.53

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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.