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Finding the Fourth Proportional to 128,880.48, 193,154.88 and 103,932.48

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Solution

The fourth proportional to 128,880.48, 193,154.88 and 103,932.48 is: 155,764.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,880.48 : 193,154.88 = 103,932.48 : x
  2. Step 2: Convert to fraction form
    128,880.48/193,154.88 = 103,932.48/x
  3. Step 3: Cross multiply
    128,880.48x = 193,154.88 × 103,932.48
  4. Step 4: Simplify right side
    128,880.48x = 20,075,065,702.50
  5. Step 5: Solve for x
    x = 20,075,065,702.50/128,880.48
  6. Step 6: Final answer
    x = 155,764.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.