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Finding the Fourth Proportional to 100,010.67, 138,014.76 and 56,988.93

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Solution

The fourth proportional to 100,010.67, 138,014.76 and 56,988.93 is: 78,644.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,010.67 : 138,014.76 = 56,988.93 : x
  2. Step 2: Convert to fraction form
    100,010.67/138,014.76 = 56,988.93/x
  3. Step 3: Cross multiply
    100,010.67x = 138,014.76 × 56,988.93
  4. Step 4: Simplify right side
    100,010.67x = 7,865,313,496.61
  5. Step 5: Solve for x
    x = 7,865,313,496.61/100,010.67
  6. Step 6: Final answer
    x = 78,644.74

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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.