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Finding the Fourth Proportional to 55,969.20, 83,953.80 and 20,904.30

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Solution

The fourth proportional to 55,969.20, 83,953.80 and 20,904.30 is: 31,356.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,969.20 : 83,953.80 = 20,904.30 : x
  2. Step 2: Convert to fraction form
    55,969.20/83,953.80 = 20,904.30/x
  3. Step 3: Cross multiply
    55,969.20x = 83,953.80 × 20,904.30
  4. Step 4: Simplify right side
    55,969.20x = 1,754,995,421.34
  5. Step 5: Solve for x
    x = 1,754,995,421.34/55,969.20
  6. Step 6: Final answer
    x = 31,356.45

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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.