Home / 124,809.68-172,327.56-77,128.40

Finding the Fourth Proportional to 124,809.68, 172,327.56 and 77,128.40

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Solution

The fourth proportional to 124,809.68, 172,327.56 and 77,128.40 is: 106,492.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,809.68 : 172,327.56 = 77,128.40 : x
  2. Step 2: Convert to fraction form
    124,809.68/172,327.56 = 77,128.40/x
  3. Step 3: Cross multiply
    124,809.68x = 172,327.56 × 77,128.40
  4. Step 4: Simplify right side
    124,809.68x = 13,291,348,978.70
  5. Step 5: Solve for x
    x = 13,291,348,978.70/124,809.68
  6. Step 6: Final answer
    x = 106,492.93

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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.