Home / 127,977.60-191,966.40-85,987.20

Finding the Fourth Proportional to 127,977.60, 191,966.40 and 85,987.20

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Solution

The fourth proportional to 127,977.60, 191,966.40 and 85,987.20 is: 128,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,977.60 : 191,966.40 = 85,987.20 : x
  2. Step 2: Convert to fraction form
    127,977.60/191,966.40 = 85,987.20/x
  3. Step 3: Cross multiply
    127,977.60x = 191,966.40 × 85,987.20
  4. Step 4: Simplify right side
    127,977.60x = 16,506,653,230.08
  5. Step 5: Solve for x
    x = 16,506,653,230.08/127,977.60
  6. Step 6: Final answer
    x = 128,980.80

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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.