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Finding the Fourth Proportional to 70,509.81, 97,303.54 and 38,678.79

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Solution

The fourth proportional to 70,509.81, 97,303.54 and 38,678.79 is: 53,376.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,509.81 : 97,303.54 = 38,678.79 : x
  2. Step 2: Convert to fraction form
    70,509.81/97,303.54 = 38,678.79/x
  3. Step 3: Cross multiply
    70,509.81x = 97,303.54 × 38,678.79
  4. Step 4: Simplify right side
    70,509.81x = 3,763,583,189.92
  5. Step 5: Solve for x
    x = 3,763,583,189.92/70,509.81
  6. Step 6: Final answer
    x = 53,376.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.