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Finding the Fourth Proportional to 172,505.58, 258,670.86 and 78,931.14

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Solution

The fourth proportional to 172,505.58, 258,670.86 and 78,931.14 is: 118,356.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,505.58 : 258,670.86 = 78,931.14 : x
  2. Step 2: Convert to fraction form
    172,505.58/258,670.86 = 78,931.14/x
  3. Step 3: Cross multiply
    172,505.58x = 258,670.86 × 78,931.14
  4. Step 4: Simplify right side
    172,505.58x = 20,417,185,864.58
  5. Step 5: Solve for x
    x = 20,417,185,864.58/172,505.58
  6. Step 6: Final answer
    x = 118,356.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.