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Finding the Fourth Proportional to 70,459.20, 105,688.80 and 65,793.60

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Solution

The fourth proportional to 70,459.20, 105,688.80 and 65,793.60 is: 98,690.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,459.20 : 105,688.80 = 65,793.60 : x
  2. Step 2: Convert to fraction form
    70,459.20/105,688.80 = 65,793.60/x
  3. Step 3: Cross multiply
    70,459.20x = 105,688.80 × 65,793.60
  4. Step 4: Simplify right side
    70,459.20x = 6,953,646,631.68
  5. Step 5: Solve for x
    x = 6,953,646,631.68/70,459.20
  6. Step 6: Final answer
    x = 98,690.40

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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.