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Finding the Fourth Proportional to 84,303.84, 126,359.76 and 28,130.76

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Solution

The fourth proportional to 84,303.84, 126,359.76 and 28,130.76 is: 42,164.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,303.84 : 126,359.76 = 28,130.76 : x
  2. Step 2: Convert to fraction form
    84,303.84/126,359.76 = 28,130.76/x
  3. Step 3: Cross multiply
    84,303.84x = 126,359.76 × 28,130.76
  4. Step 4: Simplify right side
    84,303.84x = 3,554,596,082.22
  5. Step 5: Solve for x
    x = 3,554,596,082.22/84,303.84
  6. Step 6: Final answer
    x = 42,164.11

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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.