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Finding the Fourth Proportional to 112,176, 154,802.88 and 61,875

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Solution

The fourth proportional to 112,176, 154,802.88 and 61,875 is: 85,387.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,176 : 154,802.88 = 61,875 : x
  2. Step 2: Convert to fraction form
    112,176/154,802.88 = 61,875/x
  3. Step 3: Cross multiply
    112,176x = 154,802.88 × 61,875
  4. Step 4: Simplify right side
    112,176x = 9,578,428,200
  5. Step 5: Solve for x
    x = 9,578,428,200/112,176
  6. Step 6: Final answer
    x = 85,387.50

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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.