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Finding the Fourth Proportional to 117,432, 162,056.16 and 64,440

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Solution

The fourth proportional to 117,432, 162,056.16 and 64,440 is: 88,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,432 : 162,056.16 = 64,440 : x
  2. Step 2: Convert to fraction form
    117,432/162,056.16 = 64,440/x
  3. Step 3: Cross multiply
    117,432x = 162,056.16 × 64,440
  4. Step 4: Simplify right side
    117,432x = 10,442,898,950.40
  5. Step 5: Solve for x
    x = 10,442,898,950.40/117,432
  6. Step 6: Final answer
    x = 88,927.20

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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.