Home / 128,689.06-177,595.77-72,098.50

Finding the Fourth Proportional to 128,689.06, 177,595.77 and 72,098.50

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Solution

The fourth proportional to 128,689.06, 177,595.77 and 72,098.50 is: 99,498.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,689.06 : 177,595.77 = 72,098.50 : x
  2. Step 2: Convert to fraction form
    128,689.06/177,595.77 = 72,098.50/x
  3. Step 3: Cross multiply
    128,689.06x = 177,595.77 × 72,098.50
  4. Step 4: Simplify right side
    128,689.06x = 12,804,388,623.35
  5. Step 5: Solve for x
    x = 12,804,388,623.35/128,689.06
  6. Step 6: Final answer
    x = 99,498.66

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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.