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Finding the Fourth Proportional to 118,699.53, 163,804.55 and 64,985.45

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Solution

The fourth proportional to 118,699.53, 163,804.55 and 64,985.45 is: 89,679.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,699.53 : 163,804.55 = 64,985.45 : x
  2. Step 2: Convert to fraction form
    118,699.53/163,804.55 = 64,985.45/x
  3. Step 3: Cross multiply
    118,699.53x = 163,804.55 × 64,985.45
  4. Step 4: Simplify right side
    118,699.53x = 10,644,911,737.24
  5. Step 5: Solve for x
    x = 10,644,911,737.24/118,699.53
  6. Step 6: Final answer
    x = 89,679.48

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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.