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Finding the Fourth Proportional to 91,076.76, 125,631.78 and 70,901.70

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Solution

The fourth proportional to 91,076.76, 125,631.78 and 70,901.70 is: 97,802.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,076.76 : 125,631.78 = 70,901.70 : x
  2. Step 2: Convert to fraction form
    91,076.76/125,631.78 = 70,901.70/x
  3. Step 3: Cross multiply
    91,076.76x = 125,631.78 × 70,901.70
  4. Step 4: Simplify right side
    91,076.76x = 8,907,506,776.03
  5. Step 5: Solve for x
    x = 8,907,506,776.03/91,076.76
  6. Step 6: Final answer
    x = 97,802.19

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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.