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Finding the Fourth Proportional to 64,878.50, 89,532.45 and 35,070.50

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Solution

The fourth proportional to 64,878.50, 89,532.45 and 35,070.50 is: 48,397.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,878.50 : 89,532.45 = 35,070.50 : x
  2. Step 2: Convert to fraction form
    64,878.50/89,532.45 = 35,070.50/x
  3. Step 3: Cross multiply
    64,878.50x = 89,532.45 × 35,070.50
  4. Step 4: Simplify right side
    64,878.50x = 3,139,947,787.73
  5. Step 5: Solve for x
    x = 3,139,947,787.73/64,878.50
  6. Step 6: Final answer
    x = 48,397.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.