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Finding the Fourth Proportional to 91,725.35, 128,153.05 and 91,725.35

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Solution

The fourth proportional to 91,725.35, 128,153.05 and 91,725.35 is: 128,153.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,725.35 : 128,153.05 = 91,725.35 : x
  2. Step 2: Convert to fraction form
    91,725.35/128,153.05 = 91,725.35/x
  3. Step 3: Cross multiply
    91,725.35x = 128,153.05 × 91,725.35
  4. Step 4: Simplify right side
    91,725.35x = 11,754,883,364.82
  5. Step 5: Solve for x
    x = 11,754,883,364.82/91,725.35
  6. Step 6: Final answer
    x = 128,153.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.