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Finding the Fourth Proportional to 98,410.56, 135,783.40 and 72,975.76

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Solution

The fourth proportional to 98,410.56, 135,783.40 and 72,975.76 is: 100,689.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,410.56 : 135,783.40 = 72,975.76 : x
  2. Step 2: Convert to fraction form
    98,410.56/135,783.40 = 72,975.76/x
  3. Step 3: Cross multiply
    98,410.56x = 135,783.40 × 72,975.76
  4. Step 4: Simplify right side
    98,410.56x = 9,908,896,810.38
  5. Step 5: Solve for x
    x = 9,908,896,810.38/98,410.56
  6. Step 6: Final answer
    x = 100,689.37

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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.