Home / 100,459.28-138,632.34-57,438.32

Finding the Fourth Proportional to 100,459.28, 138,632.34 and 57,438.32

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Solution

The fourth proportional to 100,459.28, 138,632.34 and 57,438.32 is: 79,264.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,459.28 : 138,632.34 = 57,438.32 : x
  2. Step 2: Convert to fraction form
    100,459.28/138,632.34 = 57,438.32/x
  3. Step 3: Cross multiply
    100,459.28x = 138,632.34 × 57,438.32
  4. Step 4: Simplify right side
    100,459.28x = 7,962,808,707.27
  5. Step 5: Solve for x
    x = 7,962,808,707.27/100,459.28
  6. Step 6: Final answer
    x = 79,264.04

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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.