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Finding the Fourth Proportional to 128,290.44, 176,925.40 and 82,920.72

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Solution

The fourth proportional to 128,290.44, 176,925.40 and 82,920.72 is: 114,356.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,290.44 : 176,925.40 = 82,920.72 : x
  2. Step 2: Convert to fraction form
    128,290.44/176,925.40 = 82,920.72/x
  3. Step 3: Cross multiply
    128,290.44x = 176,925.40 × 82,920.72
  4. Step 4: Simplify right side
    128,290.44x = 14,670,781,554.29
  5. Step 5: Solve for x
    x = 14,670,781,554.29/128,290.44
  6. Step 6: Final answer
    x = 114,356.00

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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.