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Finding the Fourth Proportional to 91,095.80, 136,935.30 and 64,981.40

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Solution

The fourth proportional to 91,095.80, 136,935.30 and 64,981.40 is: 97,680.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,095.80 : 136,935.30 = 64,981.40 : x
  2. Step 2: Convert to fraction form
    91,095.80/136,935.30 = 64,981.40/x
  3. Step 3: Cross multiply
    91,095.80x = 136,935.30 × 64,981.40
  4. Step 4: Simplify right side
    91,095.80x = 8,898,247,503.42
  5. Step 5: Solve for x
    x = 8,898,247,503.42/91,095.80
  6. Step 6: Final answer
    x = 97,680.11

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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.