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Finding the Fourth Proportional to 103,603.71, 142,985.78 and 58,283.60

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Solution

The fourth proportional to 103,603.71, 142,985.78 and 58,283.60 is: 80,438.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,603.71 : 142,985.78 = 58,283.60 : x
  2. Step 2: Convert to fraction form
    103,603.71/142,985.78 = 58,283.60/x
  3. Step 3: Cross multiply
    103,603.71x = 142,985.78 × 58,283.60
  4. Step 4: Simplify right side
    103,603.71x = 8,333,726,007.21
  5. Step 5: Solve for x
    x = 8,333,726,007.21/103,603.71
  6. Step 6: Final answer
    x = 80,438.49

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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.