Home / 136,220.07-187,980.77-78,861.83

Finding the Fourth Proportional to 136,220.07, 187,980.77 and 78,861.83

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Solution

The fourth proportional to 136,220.07, 187,980.77 and 78,861.83 is: 108,827.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,220.07 : 187,980.77 = 78,861.83 : x
  2. Step 2: Convert to fraction form
    136,220.07/187,980.77 = 78,861.83/x
  3. Step 3: Cross multiply
    136,220.07x = 187,980.77 × 78,861.83
  4. Step 4: Simplify right side
    136,220.07x = 14,824,506,192.80
  5. Step 5: Solve for x
    x = 14,824,506,192.80/136,220.07
  6. Step 6: Final answer
    x = 108,827.62

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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.