Home / 102,208.80-153,313.20-66,779.40

Finding the Fourth Proportional to 102,208.80, 153,313.20 and 66,779.40

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Solution

The fourth proportional to 102,208.80, 153,313.20 and 66,779.40 is: 100,169.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,208.80 : 153,313.20 = 66,779.40 : x
  2. Step 2: Convert to fraction form
    102,208.80/153,313.20 = 66,779.40/x
  3. Step 3: Cross multiply
    102,208.80x = 153,313.20 × 66,779.40
  4. Step 4: Simplify right side
    102,208.80x = 10,238,163,508.08
  5. Step 5: Solve for x
    x = 10,238,163,508.08/102,208.80
  6. Step 6: Final answer
    x = 100,169.10

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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.