Home / 139,547.69-192,592.07-78,310.76

Finding the Fourth Proportional to 139,547.69, 192,592.07 and 78,310.76

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Solution

The fourth proportional to 139,547.69, 192,592.07 and 78,310.76 is: 108,077.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,547.69 : 192,592.07 = 78,310.76 : x
  2. Step 2: Convert to fraction form
    139,547.69/192,592.07 = 78,310.76/x
  3. Step 3: Cross multiply
    139,547.69x = 192,592.07 × 78,310.76
  4. Step 4: Simplify right side
    139,547.69x = 15,082,030,980.12
  5. Step 5: Solve for x
    x = 15,082,030,980.12/139,547.69
  6. Step 6: Final answer
    x = 108,077.97

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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.