Home / 145,731.40-201,114.30-85,307.68

Finding the Fourth Proportional to 145,731.40, 201,114.30 and 85,307.68

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Solution

The fourth proportional to 145,731.40, 201,114.30 and 85,307.68 is: 117,727.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,731.40 : 201,114.30 = 85,307.68 : x
  2. Step 2: Convert to fraction form
    145,731.40/201,114.30 = 85,307.68/x
  3. Step 3: Cross multiply
    145,731.40x = 201,114.30 × 85,307.68
  4. Step 4: Simplify right side
    145,731.40x = 17,156,594,347.82
  5. Step 5: Solve for x
    x = 17,156,594,347.82/145,731.40
  6. Step 6: Final answer
    x = 117,727.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.