Home / 306,623.12-423,139.80-172,487.12

Finding the Fourth Proportional to 306,623.12, 423,139.80 and 172,487.12

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Solution

The fourth proportional to 306,623.12, 423,139.80 and 172,487.12 is: 238,032.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,623.12 : 423,139.80 = 172,487.12 : x
  2. Step 2: Convert to fraction form
    306,623.12/423,139.80 = 172,487.12/x
  3. Step 3: Cross multiply
    306,623.12x = 423,139.80 × 172,487.12
  4. Step 4: Simplify right side
    306,623.12x = 72,986,165,459.38
  5. Step 5: Solve for x
    x = 72,986,165,459.38/306,623.12
  6. Step 6: Final answer
    x = 238,032.17

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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.