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Finding the Fourth Proportional to 99,307.80, 148,961.70 and 57,317.40

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Solution

The fourth proportional to 99,307.80, 148,961.70 and 57,317.40 is: 85,976.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,307.80 : 148,961.70 = 57,317.40 : x
  2. Step 2: Convert to fraction form
    99,307.80/148,961.70 = 57,317.40/x
  3. Step 3: Cross multiply
    99,307.80x = 148,961.70 × 57,317.40
  4. Step 4: Simplify right side
    99,307.80x = 8,538,097,343.58
  5. Step 5: Solve for x
    x = 8,538,097,343.58/99,307.80
  6. Step 6: Final answer
    x = 85,976.10

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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.