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Finding the Fourth Proportional to 70,439.99, 105,626.54 and 40,866.89

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Solution

The fourth proportional to 70,439.99, 105,626.54 and 40,866.89 is: 61,280.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,439.99 : 105,626.54 = 40,866.89 : x
  2. Step 2: Convert to fraction form
    70,439.99/105,626.54 = 40,866.89/x
  3. Step 3: Cross multiply
    70,439.99x = 105,626.54 × 40,866.89
  4. Step 4: Simplify right side
    70,439.99x = 4,316,628,557.49
  5. Step 5: Solve for x
    x = 4,316,628,557.49/70,439.99
  6. Step 6: Final answer
    x = 61,280.93

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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.