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Finding the Fourth Proportional to 91,428.40, 136,875.30 and 65,184.40

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Solution

The fourth proportional to 91,428.40, 136,875.30 and 65,184.40 is: 97,586.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,428.40 : 136,875.30 = 65,184.40 : x
  2. Step 2: Convert to fraction form
    91,428.40/136,875.30 = 65,184.40/x
  3. Step 3: Cross multiply
    91,428.40x = 136,875.30 × 65,184.40
  4. Step 4: Simplify right side
    91,428.40x = 8,922,134,305.32
  5. Step 5: Solve for x
    x = 8,922,134,305.32/91,428.40
  6. Step 6: Final answer
    x = 97,586.03

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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.