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Finding the Fourth Proportional to 81,384.64, 112,159.68 and 55,898.56

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Solution

The fourth proportional to 81,384.64, 112,159.68 and 55,898.56 is: 77,036.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,384.64 : 112,159.68 = 55,898.56 : x
  2. Step 2: Convert to fraction form
    81,384.64/112,159.68 = 55,898.56/x
  3. Step 3: Cross multiply
    81,384.64x = 112,159.68 × 55,898.56
  4. Step 4: Simplify right side
    81,384.64x = 6,269,564,602.06
  5. Step 5: Solve for x
    x = 6,269,564,602.06/81,384.64
  6. Step 6: Final answer
    x = 77,036.21

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1.5x scale

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.