Home / 109,718.77-151,411.09-61,981.45

Finding the Fourth Proportional to 109,718.77, 151,411.09 and 61,981.45

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Solution

The fourth proportional to 109,718.77, 151,411.09 and 61,981.45 is: 85,533.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,718.77 : 151,411.09 = 61,981.45 : x
  2. Step 2: Convert to fraction form
    109,718.77/151,411.09 = 61,981.45/x
  3. Step 3: Cross multiply
    109,718.77x = 151,411.09 × 61,981.45
  4. Step 4: Simplify right side
    109,718.77x = 9,384,678,904.28
  5. Step 5: Solve for x
    x = 9,384,678,904.28/109,718.77
  6. Step 6: Final answer
    x = 85,533.94

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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.