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Finding the Fourth Proportional to 113,018.64, 155,970.62 and 67,704

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Solution

The fourth proportional to 113,018.64, 155,970.62 and 67,704 is: 93,434.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,018.64 : 155,970.62 = 67,704 : x
  2. Step 2: Convert to fraction form
    113,018.64/155,970.62 = 67,704/x
  3. Step 3: Cross multiply
    113,018.64x = 155,970.62 × 67,704
  4. Step 4: Simplify right side
    113,018.64x = 10,559,834,517.96
  5. Step 5: Solve for x
    x = 10,559,834,517.96/113,018.64
  6. Step 6: Final answer
    x = 93,434.45

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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.