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Finding the Fourth Proportional to 118,706.79, 163,809.09 and 64,981.40

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Solution

The fourth proportional to 118,706.79, 163,809.09 and 64,981.40 is: 89,670.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,706.79 : 163,809.09 = 64,981.40 : x
  2. Step 2: Convert to fraction form
    118,706.79/163,809.09 = 64,981.40/x
  3. Step 3: Cross multiply
    118,706.79x = 163,809.09 × 64,981.40
  4. Step 4: Simplify right side
    118,706.79x = 10,644,544,410.45
  5. Step 5: Solve for x
    x = 10,644,544,410.45/118,706.79
  6. Step 6: Final answer
    x = 89,670.90

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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.