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Finding the Fourth Proportional to 74,980.59, 103,472.94 and 40,989.05

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Solution

The fourth proportional to 74,980.59, 103,472.94 and 40,989.05 is: 56,564.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,980.59 : 103,472.94 = 40,989.05 : x
  2. Step 2: Convert to fraction form
    74,980.59/103,472.94 = 40,989.05/x
  3. Step 3: Cross multiply
    74,980.59x = 103,472.94 × 40,989.05
  4. Step 4: Simplify right side
    74,980.59x = 4,241,258,117.71
  5. Step 5: Solve for x
    x = 4,241,258,117.71/74,980.59
  6. Step 6: Final answer
    x = 56,564.75

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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.