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Finding the Fourth Proportional to 52,653.84, 78,981.12 and 21,066.56

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Solution

The fourth proportional to 52,653.84, 78,981.12 and 21,066.56 is: 31,599.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,653.84 : 78,981.12 = 21,066.56 : x
  2. Step 2: Convert to fraction form
    52,653.84/78,981.12 = 21,066.56/x
  3. Step 3: Cross multiply
    52,653.84x = 78,981.12 × 21,066.56
  4. Step 4: Simplify right side
    52,653.84x = 1,663,860,503.35
  5. Step 5: Solve for x
    x = 1,663,860,503.35/52,653.84
  6. Step 6: Final answer
    x = 31,599.98

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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.