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Finding the Fourth Proportional to 111,142.76, 153,378.23 and 63,398.93

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Solution

The fourth proportional to 111,142.76, 153,378.23 and 63,398.93 is: 87,491.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,142.76 : 153,378.23 = 63,398.93 : x
  2. Step 2: Convert to fraction form
    111,142.76/153,378.23 = 63,398.93/x
  3. Step 3: Cross multiply
    111,142.76x = 153,378.23 × 63,398.93
  4. Step 4: Simplify right side
    111,142.76x = 9,724,014,583.41
  5. Step 5: Solve for x
    x = 9,724,014,583.41/111,142.76
  6. Step 6: Final answer
    x = 87,491.21

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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.