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Finding the Fourth Proportional to 85,685.66, 118,246.20 and 47,959.90

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Solution

The fourth proportional to 85,685.66, 118,246.20 and 47,959.90 is: 66,184.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,685.66 : 118,246.20 = 47,959.90 : x
  2. Step 2: Convert to fraction form
    85,685.66/118,246.20 = 47,959.90/x
  3. Step 3: Cross multiply
    85,685.66x = 118,246.20 × 47,959.90
  4. Step 4: Simplify right side
    85,685.66x = 5,671,075,927.38
  5. Step 5: Solve for x
    x = 5,671,075,927.38/85,685.66
  6. Step 6: Final answer
    x = 66,184.66

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Double scale
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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.