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Finding the Fourth Proportional to 91,397.80, 126,128.10 and 51,111.10

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Solution

The fourth proportional to 91,397.80, 126,128.10 and 51,111.10 is: 70,532.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,397.80 : 126,128.10 = 51,111.10 : x
  2. Step 2: Convert to fraction form
    91,397.80/126,128.10 = 51,111.10/x
  3. Step 3: Cross multiply
    91,397.80x = 126,128.10 × 51,111.10
  4. Step 4: Simplify right side
    91,397.80x = 6,446,545,931.91
  5. Step 5: Solve for x
    x = 6,446,545,931.91/91,397.80
  6. Step 6: Final answer
    x = 70,532.83

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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.