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Finding the Fourth Proportional to 134,886.61, 186,143.56 and 74,457.30

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Solution

The fourth proportional to 134,886.61, 186,143.56 and 74,457.30 is: 102,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,886.61 : 186,143.56 = 74,457.30 : x
  2. Step 2: Convert to fraction form
    134,886.61/186,143.56 = 74,457.30/x
  3. Step 3: Cross multiply
    134,886.61x = 186,143.56 × 74,457.30
  4. Step 4: Simplify right side
    134,886.61x = 13,859,746,889.99
  5. Step 5: Solve for x
    x = 13,859,746,889.99/134,886.61
  6. Step 6: Final answer
    x = 102,751.10

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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.