Home / 145,659.08-201,006.43-81,128.11

Finding the Fourth Proportional to 145,659.08, 201,006.43 and 81,128.11

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Solution

The fourth proportional to 145,659.08, 201,006.43 and 81,128.11 is: 111,955.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,659.08 : 201,006.43 = 81,128.11 : x
  2. Step 2: Convert to fraction form
    145,659.08/201,006.43 = 81,128.11/x
  3. Step 3: Cross multiply
    145,659.08x = 201,006.43 × 81,128.11
  4. Step 4: Simplify right side
    145,659.08x = 16,307,272,875.66
  5. Step 5: Solve for x
    x = 16,307,272,875.66/145,659.08
  6. Step 6: Final answer
    x = 111,955.07

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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.