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Finding the Fourth Proportional to 130,534.80, 195,413.40 and 77,917.20

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Solution

The fourth proportional to 130,534.80, 195,413.40 and 77,917.20 is: 116,643.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,534.80 : 195,413.40 = 77,917.20 : x
  2. Step 2: Convert to fraction form
    130,534.80/195,413.40 = 77,917.20/x
  3. Step 3: Cross multiply
    130,534.80x = 195,413.40 × 77,917.20
  4. Step 4: Simplify right side
    130,534.80x = 15,226,064,970.48
  5. Step 5: Solve for x
    x = 15,226,064,970.48/130,534.80
  6. Step 6: Final answer
    x = 116,643.72

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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.