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Finding the Fourth Proportional to 92,988.61, 139,430.39 and 85,053.89

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Solution

The fourth proportional to 92,988.61, 139,430.39 and 85,053.89 is: 127,532.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,988.61 : 139,430.39 = 85,053.89 : x
  2. Step 2: Convert to fraction form
    92,988.61/139,430.39 = 85,053.89/x
  3. Step 3: Cross multiply
    92,988.61x = 139,430.39 × 85,053.89
  4. Step 4: Simplify right side
    92,988.61x = 11,859,096,628.45
  5. Step 5: Solve for x
    x = 11,859,096,628.45/92,988.61
  6. Step 6: Final answer
    x = 127,532.79

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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.