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Finding the Fourth Proportional to 85,070.71, 127,684.91 and 42,980.42

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Solution

The fourth proportional to 85,070.71, 127,684.91 and 42,980.42 is: 64,510.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,070.71 : 127,684.91 = 42,980.42 : x
  2. Step 2: Convert to fraction form
    85,070.71/127,684.91 = 42,980.42/x
  3. Step 3: Cross multiply
    85,070.71x = 127,684.91 × 42,980.42
  4. Step 4: Simplify right side
    85,070.71x = 5,487,951,244.36
  5. Step 5: Solve for x
    x = 5,487,951,244.36/85,070.71
  6. Step 6: Final answer
    x = 64,510.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.