Home / 105,435.68-145,500.64-57,688.16

Finding the Fourth Proportional to 105,435.68, 145,500.64 and 57,688.16

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Solution

The fourth proportional to 105,435.68, 145,500.64 and 57,688.16 is: 79,609.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,435.68 : 145,500.64 = 57,688.16 : x
  2. Step 2: Convert to fraction form
    105,435.68/145,500.64 = 57,688.16/x
  3. Step 3: Cross multiply
    105,435.68x = 145,500.64 × 57,688.16
  4. Step 4: Simplify right side
    105,435.68x = 8,393,664,200.42
  5. Step 5: Solve for x
    x = 8,393,664,200.42/105,435.68
  6. Step 6: Final answer
    x = 79,609.33

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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.