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Finding the Fourth Proportional to 103,345.70, 155,018.55 and 98,424.95

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Solution

The fourth proportional to 103,345.70, 155,018.55 and 98,424.95 is: 147,637.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,345.70 : 155,018.55 = 98,424.95 : x
  2. Step 2: Convert to fraction form
    103,345.70/155,018.55 = 98,424.95/x
  3. Step 3: Cross multiply
    103,345.70x = 155,018.55 × 98,424.95
  4. Step 4: Simplify right side
    103,345.70x = 15,257,693,032.82
  5. Step 5: Solve for x
    x = 15,257,693,032.82/103,345.70
  6. Step 6: Final answer
    x = 147,637.43

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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.