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Finding the Fourth Proportional to 86,730.60, 129,966.30 and 73,511.40

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Solution

The fourth proportional to 86,730.60, 129,966.30 and 73,511.40 is: 110,157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,730.60 : 129,966.30 = 73,511.40 : x
  2. Step 2: Convert to fraction form
    86,730.60/129,966.30 = 73,511.40/x
  3. Step 3: Cross multiply
    86,730.60x = 129,966.30 × 73,511.40
  4. Step 4: Simplify right side
    86,730.60x = 9,554,004,665.82
  5. Step 5: Solve for x
    x = 9,554,004,665.82/86,730.60
  6. Step 6: Final answer
    x = 110,157.25

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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.