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Finding the Fourth Proportional to 91,322.64, 137,011.65 and 64,720.07

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Solution

The fourth proportional to 91,322.64, 137,011.65 and 64,720.07 is: 97,099.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,322.64 : 137,011.65 = 64,720.07 : x
  2. Step 2: Convert to fraction form
    91,322.64/137,011.65 = 64,720.07/x
  3. Step 3: Cross multiply
    91,322.64x = 137,011.65 × 64,720.07
  4. Step 4: Simplify right side
    91,322.64x = 8,867,402,893.76
  5. Step 5: Solve for x
    x = 8,867,402,893.76/91,322.64
  6. Step 6: Final answer
    x = 97,099.72

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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.