Home / 128,577.32-177,408.05-77,598.35

Finding the Fourth Proportional to 128,577.32, 177,408.05 and 77,598.35

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Solution

The fourth proportional to 128,577.32, 177,408.05 and 77,598.35 is: 107,068.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,577.32 : 177,408.05 = 77,598.35 : x
  2. Step 2: Convert to fraction form
    128,577.32/177,408.05 = 77,598.35/x
  3. Step 3: Cross multiply
    128,577.32x = 177,408.05 × 77,598.35
  4. Step 4: Simplify right side
    128,577.32x = 13,766,570,681.69
  5. Step 5: Solve for x
    x = 13,766,570,681.69/128,577.32
  6. Step 6: Final answer
    x = 107,068.43

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1.5x scale

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.