Home / 78,095.51-117,142.23-18,931.72

Finding the Fourth Proportional to 78,095.51, 117,142.23 and 18,931.72

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Solution

The fourth proportional to 78,095.51, 117,142.23 and 18,931.72 is: 28,397.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,095.51 : 117,142.23 = 18,931.72 : x
  2. Step 2: Convert to fraction form
    78,095.51/117,142.23 = 18,931.72/x
  3. Step 3: Cross multiply
    78,095.51x = 117,142.23 × 18,931.72
  4. Step 4: Simplify right side
    78,095.51x = 2,217,703,898.54
  5. Step 5: Solve for x
    x = 2,217,703,898.54/78,095.51
  6. Step 6: Final answer
    x = 28,397.33

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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.