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Finding the Fourth Proportional to 99,307.80, 148,961.70 and 63,878.40

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Solution

The fourth proportional to 99,307.80, 148,961.70 and 63,878.40 is: 95,817.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,307.80 : 148,961.70 = 63,878.40 : x
  2. Step 2: Convert to fraction form
    99,307.80/148,961.70 = 63,878.40/x
  3. Step 3: Cross multiply
    99,307.80x = 148,961.70 × 63,878.40
  4. Step 4: Simplify right side
    99,307.80x = 9,515,435,057.28
  5. Step 5: Solve for x
    x = 9,515,435,057.28/99,307.80
  6. Step 6: Final answer
    x = 95,817.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.