Home / 135,136.02-186,503.93-78,547.40

Finding the Fourth Proportional to 135,136.02, 186,503.93 and 78,547.40

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Solution

The fourth proportional to 135,136.02, 186,503.93 and 78,547.40 is: 108,404.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,136.02 : 186,503.93 = 78,547.40 : x
  2. Step 2: Convert to fraction form
    135,136.02/186,503.93 = 78,547.40/x
  3. Step 3: Cross multiply
    135,136.02x = 186,503.93 × 78,547.40
  4. Step 4: Simplify right side
    135,136.02x = 14,649,398,791.28
  5. Step 5: Solve for x
    x = 14,649,398,791.28/135,136.02
  6. Step 6: Final answer
    x = 108,404.84

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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.