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Finding the Fourth Proportional to 115,569.60, 172,970.40 and 83,889.60

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Solution

The fourth proportional to 115,569.60, 172,970.40 and 83,889.60 is: 125,555.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,569.60 : 172,970.40 = 83,889.60 : x
  2. Step 2: Convert to fraction form
    115,569.60/172,970.40 = 83,889.60/x
  3. Step 3: Cross multiply
    115,569.60x = 172,970.40 × 83,889.60
  4. Step 4: Simplify right side
    115,569.60x = 14,510,417,667.84
  5. Step 5: Solve for x
    x = 14,510,417,667.84/115,569.60
  6. Step 6: Final answer
    x = 125,555.66

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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.