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Finding the Fourth Proportional to 86,023.60, 129,035.40 and 70,277.20

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Solution

The fourth proportional to 86,023.60, 129,035.40 and 70,277.20 is: 105,415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,023.60 : 129,035.40 = 70,277.20 : x
  2. Step 2: Convert to fraction form
    86,023.60/129,035.40 = 70,277.20/x
  3. Step 3: Cross multiply
    86,023.60x = 129,035.40 × 70,277.20
  4. Step 4: Simplify right side
    86,023.60x = 9,068,246,612.88
  5. Step 5: Solve for x
    x = 9,068,246,612.88/86,023.60
  6. Step 6: Final answer
    x = 105,415.80

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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.