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Finding the Fourth Proportional to 145,710.16, 218,490.04 and 66,756.72

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Solution

The fourth proportional to 145,710.16, 218,490.04 and 66,756.72 is: 100,100.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,710.16 : 218,490.04 = 66,756.72 : x
  2. Step 2: Convert to fraction form
    145,710.16/218,490.04 = 66,756.72/x
  3. Step 3: Cross multiply
    145,710.16x = 218,490.04 × 66,756.72
  4. Step 4: Simplify right side
    145,710.16x = 14,585,678,423.07
  5. Step 5: Solve for x
    x = 14,585,678,423.07/145,710.16
  6. Step 6: Final answer
    x = 100,100.63

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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.