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Finding the Fourth Proportional to 98,830.80, 148,537.80 and 86,000.40

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Solution

The fourth proportional to 98,830.80, 148,537.80 and 86,000.40 is: 129,254.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,830.80 : 148,537.80 = 86,000.40 : x
  2. Step 2: Convert to fraction form
    98,830.80/148,537.80 = 86,000.40/x
  3. Step 3: Cross multiply
    98,830.80x = 148,537.80 × 86,000.40
  4. Step 4: Simplify right side
    98,830.80x = 12,774,310,215.12
  5. Step 5: Solve for x
    x = 12,774,310,215.12/98,830.80
  6. Step 6: Final answer
    x = 129,254.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.