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Finding the Fourth Proportional to 128,927.94, 193,459.95 and 69,752.58

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Solution

The fourth proportional to 128,927.94, 193,459.95 and 69,752.58 is: 104,665.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,927.94 : 193,459.95 = 69,752.58 : x
  2. Step 2: Convert to fraction form
    128,927.94/193,459.95 = 69,752.58/x
  3. Step 3: Cross multiply
    128,927.94x = 193,459.95 × 69,752.58
  4. Step 4: Simplify right side
    128,927.94x = 13,494,330,639.17
  5. Step 5: Solve for x
    x = 13,494,330,639.17/128,927.94
  6. Step 6: Final answer
    x = 104,665.68

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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.