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Finding the Fourth Proportional to 66,307.60, 99,315.60 and 54,643.60

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Solution

The fourth proportional to 66,307.60, 99,315.60 and 54,643.60 is: 81,845.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,307.60 : 99,315.60 = 54,643.60 : x
  2. Step 2: Convert to fraction form
    66,307.60/99,315.60 = 54,643.60/x
  3. Step 3: Cross multiply
    66,307.60x = 99,315.60 × 54,643.60
  4. Step 4: Simplify right side
    66,307.60x = 5,426,961,920.16
  5. Step 5: Solve for x
    x = 5,426,961,920.16/66,307.60
  6. Step 6: Final answer
    x = 81,845.25

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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.