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Finding the Fourth Proportional to 85,487.84, 117,978.80 and 56,762.52

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Solution

The fourth proportional to 85,487.84, 117,978.80 and 56,762.52 is: 78,335.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,487.84 : 117,978.80 = 56,762.52 : x
  2. Step 2: Convert to fraction form
    85,487.84/117,978.80 = 56,762.52/x
  3. Step 3: Cross multiply
    85,487.84x = 117,978.80 × 56,762.52
  4. Step 4: Simplify right side
    85,487.84x = 6,696,773,994.58
  5. Step 5: Solve for x
    x = 6,696,773,994.58/85,487.84
  6. Step 6: Final answer
    x = 78,335.98

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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.