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Finding the Fourth Proportional to 113,710.40, 156,959.52 and 68,413.76

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Solution

The fourth proportional to 113,710.40, 156,959.52 and 68,413.76 is: 94,434.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,710.40 : 156,959.52 = 68,413.76 : x
  2. Step 2: Convert to fraction form
    113,710.40/156,959.52 = 68,413.76/x
  3. Step 3: Cross multiply
    113,710.40x = 156,959.52 × 68,413.76
  4. Step 4: Simplify right side
    113,710.40x = 10,738,190,931.00
  5. Step 5: Solve for x
    x = 10,738,190,931.00/113,710.40
  6. Step 6: Final answer
    x = 94,434.55

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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.