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Finding the Fourth Proportional to 66,307.60, 99,461.40 and 63,428.05

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Solution

The fourth proportional to 66,307.60, 99,461.40 and 63,428.05 is: 95,142.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,307.60 : 99,461.40 = 63,428.05 : x
  2. Step 2: Convert to fraction form
    66,307.60/99,461.40 = 63,428.05/x
  3. Step 3: Cross multiply
    66,307.60x = 99,461.40 × 63,428.05
  4. Step 4: Simplify right side
    66,307.60x = 6,308,642,652.27
  5. Step 5: Solve for x
    x = 6,308,642,652.27/66,307.60
  6. Step 6: Final answer
    x = 95,142.08

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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.