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Finding the Fourth Proportional to 85,798.80, 118,384.90 and 55,579.93

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Solution

The fourth proportional to 85,798.80, 118,384.90 and 55,579.93 is: 76,689.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,798.80 : 118,384.90 = 55,579.93 : x
  2. Step 2: Convert to fraction form
    85,798.80/118,384.90 = 55,579.93/x
  3. Step 3: Cross multiply
    85,798.80x = 118,384.90 × 55,579.93
  4. Step 4: Simplify right side
    85,798.80x = 6,579,824,020.14
  5. Step 5: Solve for x
    x = 6,579,824,020.14/85,798.80
  6. Step 6: Final answer
    x = 76,689.00

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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.