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Finding the Fourth Proportional to 91,710.70, 128,526.20 and 91,710.70

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Solution

The fourth proportional to 91,710.70, 128,526.20 and 91,710.70 is: 128,526.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,710.70 : 128,526.20 = 91,710.70 : x
  2. Step 2: Convert to fraction form
    91,710.70/128,526.20 = 91,710.70/x
  3. Step 3: Cross multiply
    91,710.70x = 128,526.20 × 91,710.70
  4. Step 4: Simplify right side
    91,710.70x = 11,787,227,770.34
  5. Step 5: Solve for x
    x = 11,787,227,770.34/91,710.70
  6. Step 6: Final answer
    x = 128,526.20

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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.