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Finding the Fourth Proportional to 207,111.20, 310,666.80 and 74,055.20

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Solution

The fourth proportional to 207,111.20, 310,666.80 and 74,055.20 is: 111,082.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,111.20 : 310,666.80 = 74,055.20 : x
  2. Step 2: Convert to fraction form
    207,111.20/310,666.80 = 74,055.20/x
  3. Step 3: Cross multiply
    207,111.20x = 310,666.80 × 74,055.20
  4. Step 4: Simplify right side
    207,111.20x = 23,006,492,007.36
  5. Step 5: Solve for x
    x = 23,006,492,007.36/207,111.20
  6. Step 6: Final answer
    x = 111,082.80

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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.