Home / 115,154.94-172,699.61-72,971.36

Finding the Fourth Proportional to 115,154.94, 172,699.61 and 72,971.36

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Solution

The fourth proportional to 115,154.94, 172,699.61 and 72,971.36 is: 109,436.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,154.94 : 172,699.61 = 72,971.36 : x
  2. Step 2: Convert to fraction form
    115,154.94/172,699.61 = 72,971.36/x
  3. Step 3: Cross multiply
    115,154.94x = 172,699.61 × 72,971.36
  4. Step 4: Simplify right side
    115,154.94x = 12,602,124,184.81
  5. Step 5: Solve for x
    x = 12,602,124,184.81/115,154.94
  6. Step 6: Final answer
    x = 109,436.24

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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.