Home / 105,159.16-145,136.31-66,878.80

Finding the Fourth Proportional to 105,159.16, 145,136.31 and 66,878.80

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Solution

The fourth proportional to 105,159.16, 145,136.31 and 66,878.80 is: 92,303.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,159.16 : 145,136.31 = 66,878.80 : x
  2. Step 2: Convert to fraction form
    105,159.16/145,136.31 = 66,878.80/x
  3. Step 3: Cross multiply
    105,159.16x = 145,136.31 × 66,878.80
  4. Step 4: Simplify right side
    105,159.16x = 9,706,541,189.15
  5. Step 5: Solve for x
    x = 9,706,541,189.15/105,159.16
  6. Step 6: Final answer
    x = 92,303.34

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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.