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Finding the Fourth Proportional to 91,570.72, 126,387.12 and 53,866.48

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Solution

The fourth proportional to 91,570.72, 126,387.12 and 53,866.48 is: 74,347.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,570.72 : 126,387.12 = 53,866.48 : x
  2. Step 2: Convert to fraction form
    91,570.72/126,387.12 = 53,866.48/x
  3. Step 3: Cross multiply
    91,570.72x = 126,387.12 × 53,866.48
  4. Step 4: Simplify right side
    91,570.72x = 6,808,029,271.74
  5. Step 5: Solve for x
    x = 6,808,029,271.74/91,570.72
  6. Step 6: Final answer
    x = 74,347.23

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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.