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Finding the Fourth Proportional to 118,857.32, 163,928.60 and 101,011.40

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Solution

The fourth proportional to 118,857.32, 163,928.60 and 101,011.40 is: 139,315.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,857.32 : 163,928.60 = 101,011.40 : x
  2. Step 2: Convert to fraction form
    118,857.32/163,928.60 = 101,011.40/x
  3. Step 3: Cross multiply
    118,857.32x = 163,928.60 × 101,011.40
  4. Step 4: Simplify right side
    118,857.32x = 16,558,657,386.04
  5. Step 5: Solve for x
    x = 16,558,657,386.04/118,857.32
  6. Step 6: Final answer
    x = 139,315.42

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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.