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Finding the Fourth Proportional to 218,702.34, 301,830.66 and 128,052.72

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Solution

The fourth proportional to 218,702.34, 301,830.66 and 128,052.72 is: 176,725.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,702.34 : 301,830.66 = 128,052.72 : x
  2. Step 2: Convert to fraction form
    218,702.34/301,830.66 = 128,052.72/x
  3. Step 3: Cross multiply
    218,702.34x = 301,830.66 × 128,052.72
  4. Step 4: Simplify right side
    218,702.34x = 38,650,236,992.40
  5. Step 5: Solve for x
    x = 38,650,236,992.40/218,702.34
  6. Step 6: Final answer
    x = 176,725.30

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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.