Home / 128,176.08-176,856-74,433.36

Finding the Fourth Proportional to 128,176.08, 176,856 and 74,433.36

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Solution

The fourth proportional to 128,176.08, 176,856 and 74,433.36 is: 102,702.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,176.08 : 176,856 = 74,433.36 : x
  2. Step 2: Convert to fraction form
    128,176.08/176,856 = 74,433.36/x
  3. Step 3: Cross multiply
    128,176.08x = 176,856 × 74,433.36
  4. Step 4: Simplify right side
    128,176.08x = 13,163,986,316.16
  5. Step 5: Solve for x
    x = 13,163,986,316.16/128,176.08
  6. Step 6: Final answer
    x = 102,702.36

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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.