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Finding the Fourth Proportional to 113,421, 156,527.88 and 63,120

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Solution

The fourth proportional to 113,421, 156,527.88 and 63,120 is: 87,109.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,421 : 156,527.88 = 63,120 : x
  2. Step 2: Convert to fraction form
    113,421/156,527.88 = 63,120/x
  3. Step 3: Cross multiply
    113,421x = 156,527.88 × 63,120
  4. Step 4: Simplify right side
    113,421x = 9,880,039,785.60
  5. Step 5: Solve for x
    x = 9,880,039,785.60/113,421
  6. Step 6: Final answer
    x = 87,109.44

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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.