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Finding the Fourth Proportional to 98,574.56, 148,526.91 and 81,428.32

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Solution

The fourth proportional to 98,574.56, 148,526.91 and 81,428.32 is: 122,691.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,574.56 : 148,526.91 = 81,428.32 : x
  2. Step 2: Convert to fraction form
    98,574.56/148,526.91 = 81,428.32/x
  3. Step 3: Cross multiply
    98,574.56x = 148,526.91 × 81,428.32
  4. Step 4: Simplify right side
    98,574.56x = 12,094,296,756.09
  5. Step 5: Solve for x
    x = 12,094,296,756.09/98,574.56
  6. Step 6: Final answer
    x = 122,691.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.