Home / 78,516.81-108,352.08-42,707.12

Finding the Fourth Proportional to 78,516.81, 108,352.08 and 42,707.12

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Solution

The fourth proportional to 78,516.81, 108,352.08 and 42,707.12 is: 58,935.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,516.81 : 108,352.08 = 42,707.12 : x
  2. Step 2: Convert to fraction form
    78,516.81/108,352.08 = 42,707.12/x
  3. Step 3: Cross multiply
    78,516.81x = 108,352.08 × 42,707.12
  4. Step 4: Simplify right side
    78,516.81x = 4,627,404,741.05
  5. Step 5: Solve for x
    x = 4,627,404,741.05/78,516.81
  6. Step 6: Final answer
    x = 58,935.21

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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.