Home / 129,391.08-178,547.88-75,666.75

Finding the Fourth Proportional to 129,391.08, 178,547.88 and 75,666.75

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Solution

The fourth proportional to 129,391.08, 178,547.88 and 75,666.75 is: 104,413.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,391.08 : 178,547.88 = 75,666.75 : x
  2. Step 2: Convert to fraction form
    129,391.08/178,547.88 = 75,666.75/x
  3. Step 3: Cross multiply
    129,391.08x = 178,547.88 × 75,666.75
  4. Step 4: Simplify right side
    129,391.08x = 13,510,137,798.99
  5. Step 5: Solve for x
    x = 13,510,137,798.99/129,391.08
  6. Step 6: Final answer
    x = 104,413.21

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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.