Home / 129,681.54-178,975.80-72,329.90

Finding the Fourth Proportional to 129,681.54, 178,975.80 and 72,329.90

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Solution

The fourth proportional to 129,681.54, 178,975.80 and 72,329.90 is: 99,823.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,681.54 : 178,975.80 = 72,329.90 : x
  2. Step 2: Convert to fraction form
    129,681.54/178,975.80 = 72,329.90/x
  3. Step 3: Cross multiply
    129,681.54x = 178,975.80 × 72,329.90
  4. Step 4: Simplify right side
    129,681.54x = 12,945,300,821.54
  5. Step 5: Solve for x
    x = 12,945,300,821.54/129,681.54
  6. Step 6: Final answer
    x = 99,823.77

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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.