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Finding the Fourth Proportional to 118,308.90, 163,263.90 and 64,594.36

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Solution

The fourth proportional to 118,308.90, 163,263.90 and 64,594.36 is: 89,138.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,308.90 : 163,263.90 = 64,594.36 : x
  2. Step 2: Convert to fraction form
    118,308.90/163,263.90 = 64,594.36/x
  3. Step 3: Cross multiply
    118,308.90x = 163,263.90 × 64,594.36
  4. Step 4: Simplify right side
    118,308.90x = 10,545,927,131.60
  5. Step 5: Solve for x
    x = 10,545,927,131.60/118,308.90
  6. Step 6: Final answer
    x = 89,138.92

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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.