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Finding the Fourth Proportional to 124,487.40, 171,807.11 and 70,780.44

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Solution

The fourth proportional to 124,487.40, 171,807.11 and 70,780.44 is: 97,685.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,487.40 : 171,807.11 = 70,780.44 : x
  2. Step 2: Convert to fraction form
    124,487.40/171,807.11 = 70,780.44/x
  3. Step 3: Cross multiply
    124,487.40x = 171,807.11 × 70,780.44
  4. Step 4: Simplify right side
    124,487.40x = 12,160,582,840.93
  5. Step 5: Solve for x
    x = 12,160,582,840.93/124,487.40
  6. Step 6: Final answer
    x = 97,685.25

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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.