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Finding the Fourth Proportional to 92,681.60, 139,022.40 and 57,603.20

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Solution

The fourth proportional to 92,681.60, 139,022.40 and 57,603.20 is: 86,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,681.60 : 139,022.40 = 57,603.20 : x
  2. Step 2: Convert to fraction form
    92,681.60/139,022.40 = 57,603.20/x
  3. Step 3: Cross multiply
    92,681.60x = 139,022.40 × 57,603.20
  4. Step 4: Simplify right side
    92,681.60x = 8,008,135,111.68
  5. Step 5: Solve for x
    x = 8,008,135,111.68/92,681.60
  6. Step 6: Final answer
    x = 86,404.80

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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.