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Finding the Fourth Proportional to 70,230.40, 105,345.60 and 64,009.60

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Solution

The fourth proportional to 70,230.40, 105,345.60 and 64,009.60 is: 96,014.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,230.40 : 105,345.60 = 64,009.60 : x
  2. Step 2: Convert to fraction form
    70,230.40/105,345.60 = 64,009.60/x
  3. Step 3: Cross multiply
    70,230.40x = 105,345.60 × 64,009.60
  4. Step 4: Simplify right side
    70,230.40x = 6,743,129,717.76
  5. Step 5: Solve for x
    x = 6,743,129,717.76/70,230.40
  6. Step 6: Final answer
    x = 96,014.40

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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.