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Finding the Fourth Proportional to 79,316.81, 109,435.01 and 51,038.90

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Solution

The fourth proportional to 79,316.81, 109,435.01 and 51,038.90 is: 70,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,316.81 : 109,435.01 = 51,038.90 : x
  2. Step 2: Convert to fraction form
    79,316.81/109,435.01 = 51,038.90/x
  3. Step 3: Cross multiply
    79,316.81x = 109,435.01 × 51,038.90
  4. Step 4: Simplify right side
    79,316.81x = 5,585,441,729.52
  5. Step 5: Solve for x
    x = 5,585,441,729.52/79,316.81
  6. Step 6: Final answer
    x = 70,419.40

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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.