Home / 129,570.02-178,808.62-72,207.78

Finding the Fourth Proportional to 129,570.02, 178,808.62 and 72,207.78

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Solution

The fourth proportional to 129,570.02, 178,808.62 and 72,207.78 is: 99,647.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,570.02 : 178,808.62 = 72,207.78 : x
  2. Step 2: Convert to fraction form
    129,570.02/178,808.62 = 72,207.78/x
  3. Step 3: Cross multiply
    129,570.02x = 178,808.62 × 72,207.78
  4. Step 4: Simplify right side
    129,570.02x = 12,911,373,495.06
  5. Step 5: Solve for x
    x = 12,911,373,495.06/129,570.02
  6. Step 6: Final answer
    x = 99,647.85

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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.