Home / 145,438.30-218,254.65-66,511.90

Finding the Fourth Proportional to 145,438.30, 218,254.65 and 66,511.90

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Solution

The fourth proportional to 145,438.30, 218,254.65 and 66,511.90 is: 99,812.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,438.30 : 218,254.65 = 66,511.90 : x
  2. Step 2: Convert to fraction form
    145,438.30/218,254.65 = 66,511.90/x
  3. Step 3: Cross multiply
    145,438.30x = 218,254.65 × 66,511.90
  4. Step 4: Simplify right side
    145,438.30x = 14,516,531,455.34
  5. Step 5: Solve for x
    x = 14,516,531,455.34/145,438.30
  6. Step 6: Final answer
    x = 99,812.30

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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.