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Finding the Fourth Proportional to 70,533.79, 105,807.51 and 20,612.76

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Solution

The fourth proportional to 70,533.79, 105,807.51 and 20,612.76 is: 30,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,533.79 : 105,807.51 = 20,612.76 : x
  2. Step 2: Convert to fraction form
    70,533.79/105,807.51 = 20,612.76/x
  3. Step 3: Cross multiply
    70,533.79x = 105,807.51 × 20,612.76
  4. Step 4: Simplify right side
    70,533.79x = 2,180,984,809.83
  5. Step 5: Solve for x
    x = 2,180,984,809.83/70,533.79
  6. Step 6: Final answer
    x = 30,921.13

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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.