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Finding the Fourth Proportional to 86,005.60, 129,008.40 and 86,005.60

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Solution

The fourth proportional to 86,005.60, 129,008.40 and 86,005.60 is: 129,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,005.60 : 129,008.40 = 86,005.60 : x
  2. Step 2: Convert to fraction form
    86,005.60/129,008.40 = 86,005.60/x
  3. Step 3: Cross multiply
    86,005.60x = 129,008.40 × 86,005.60
  4. Step 4: Simplify right side
    86,005.60x = 11,095,444,847.04
  5. Step 5: Solve for x
    x = 11,095,444,847.04/86,005.60
  6. Step 6: Final answer
    x = 129,008.40

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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.