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Finding the Fourth Proportional to 84,937.40, 127,406.10 and 79,688.60

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Solution

The fourth proportional to 84,937.40, 127,406.10 and 79,688.60 is: 119,532.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,937.40 : 127,406.10 = 79,688.60 : x
  2. Step 2: Convert to fraction form
    84,937.40/127,406.10 = 79,688.60/x
  3. Step 3: Cross multiply
    84,937.40x = 127,406.10 × 79,688.60
  4. Step 4: Simplify right side
    84,937.40x = 10,152,813,740.46
  5. Step 5: Solve for x
    x = 10,152,813,740.46/84,937.40
  6. Step 6: Final answer
    x = 119,532.90

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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.