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Finding the Fourth Proportional to 112,810.65, 155,658.96 and 64,390.47

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Solution

The fourth proportional to 112,810.65, 155,658.96 and 64,390.47 is: 88,847.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,810.65 : 155,658.96 = 64,390.47 : x
  2. Step 2: Convert to fraction form
    112,810.65/155,658.96 = 64,390.47/x
  3. Step 3: Cross multiply
    112,810.65x = 155,658.96 × 64,390.47
  4. Step 4: Simplify right side
    112,810.65x = 10,022,953,594.11
  5. Step 5: Solve for x
    x = 10,022,953,594.11/112,810.65
  6. Step 6: Final answer
    x = 88,847.58

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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.