Home / 129,381.79-178,551.59-72,024.07

Finding the Fourth Proportional to 129,381.79, 178,551.59 and 72,024.07

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Solution

The fourth proportional to 129,381.79, 178,551.59 and 72,024.07 is: 99,395.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,381.79 : 178,551.59 = 72,024.07 : x
  2. Step 2: Convert to fraction form
    129,381.79/178,551.59 = 72,024.07/x
  3. Step 3: Cross multiply
    129,381.79x = 178,551.59 × 72,024.07
  4. Step 4: Simplify right side
    129,381.79x = 12,860,010,963.89
  5. Step 5: Solve for x
    x = 12,860,010,963.89/129,381.79
  6. Step 6: Final answer
    x = 99,395.84

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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.