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Finding the Fourth Proportional to 91,354.40, 137,031.60 and 70,592.80

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Solution

The fourth proportional to 91,354.40, 137,031.60 and 70,592.80 is: 105,889.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,354.40 : 137,031.60 = 70,592.80 : x
  2. Step 2: Convert to fraction form
    91,354.40/137,031.60 = 70,592.80/x
  3. Step 3: Cross multiply
    91,354.40x = 137,031.60 × 70,592.80
  4. Step 4: Simplify right side
    91,354.40x = 9,673,444,332.48
  5. Step 5: Solve for x
    x = 9,673,444,332.48/91,354.40
  6. Step 6: Final answer
    x = 105,889.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.