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Finding the Fourth Proportional to 118,121.76, 163,005.03 and 64,407.78

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Solution

The fourth proportional to 118,121.76, 163,005.03 and 64,407.78 is: 88,881.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,121.76 : 163,005.03 = 64,407.78 : x
  2. Step 2: Convert to fraction form
    118,121.76/163,005.03 = 64,407.78/x
  3. Step 3: Cross multiply
    118,121.76x = 163,005.03 × 64,407.78
  4. Step 4: Simplify right side
    118,121.76x = 10,498,792,111.13
  5. Step 5: Solve for x
    x = 10,498,792,111.13/118,121.76
  6. Step 6: Final answer
    x = 88,881.10

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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.