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Finding the Fourth Proportional to 118,412.90, 163,409.51 and 64,698.32

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Solution

The fourth proportional to 118,412.90, 163,409.51 and 64,698.32 is: 89,283.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,412.90 : 163,409.51 = 64,698.32 : x
  2. Step 2: Convert to fraction form
    118,412.90/163,409.51 = 64,698.32/x
  3. Step 3: Cross multiply
    118,412.90x = 163,409.51 × 64,698.32
  4. Step 4: Simplify right side
    118,412.90x = 10,572,320,198.75
  5. Step 5: Solve for x
    x = 10,572,320,198.75/118,412.90
  6. Step 6: Final answer
    x = 89,283.52

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1.5x scale

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.