Home / 103,928.64-143,432.64-63,669.12

Finding the Fourth Proportional to 103,928.64, 143,432.64 and 63,669.12

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Solution

The fourth proportional to 103,928.64, 143,432.64 and 63,669.12 is: 87,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,928.64 : 143,432.64 = 63,669.12 : x
  2. Step 2: Convert to fraction form
    103,928.64/143,432.64 = 63,669.12/x
  3. Step 3: Cross multiply
    103,928.64x = 143,432.64 × 63,669.12
  4. Step 4: Simplify right side
    103,928.64x = 9,132,229,968.08
  5. Step 5: Solve for x
    x = 9,132,229,968.08/103,928.64
  6. Step 6: Final answer
    x = 87,870.20

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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.