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Finding the Fourth Proportional to 118,783.17, 163,920.80 and 65,070.09

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Solution

The fourth proportional to 118,783.17, 163,920.80 and 65,070.09 is: 89,796.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,783.17 : 163,920.80 = 65,070.09 : x
  2. Step 2: Convert to fraction form
    118,783.17/163,920.80 = 65,070.09/x
  3. Step 3: Cross multiply
    118,783.17x = 163,920.80 × 65,070.09
  4. Step 4: Simplify right side
    118,783.17x = 10,666,341,618.67
  5. Step 5: Solve for x
    x = 10,666,341,618.67/118,783.17
  6. Step 6: Final answer
    x = 89,796.74

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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.