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Finding the Fourth Proportional to 91,322.80, 136,984.20 and 56,148.40

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Solution

The fourth proportional to 91,322.80, 136,984.20 and 56,148.40 is: 84,222.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,322.80 : 136,984.20 = 56,148.40 : x
  2. Step 2: Convert to fraction form
    91,322.80/136,984.20 = 56,148.40/x
  3. Step 3: Cross multiply
    91,322.80x = 136,984.20 × 56,148.40
  4. Step 4: Simplify right side
    91,322.80x = 7,691,443,655.28
  5. Step 5: Solve for x
    x = 7,691,443,655.28/91,322.80
  6. Step 6: Final answer
    x = 84,222.60

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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.