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Finding the Fourth Proportional to 145,384.80, 218,113.20 and 66,482.40

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Solution

The fourth proportional to 145,384.80, 218,113.20 and 66,482.40 is: 99,740.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,384.80 : 218,113.20 = 66,482.40 : x
  2. Step 2: Convert to fraction form
    145,384.80/218,113.20 = 66,482.40/x
  3. Step 3: Cross multiply
    145,384.80x = 218,113.20 × 66,482.40
  4. Step 4: Simplify right side
    145,384.80x = 14,500,689,007.68
  5. Step 5: Solve for x
    x = 14,500,689,007.68/145,384.80
  6. Step 6: Final answer
    x = 99,740.06

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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.