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Finding the Fourth Proportional to 157,215.71, 216,950.54 and 85,595.58

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Solution

The fourth proportional to 157,215.71, 216,950.54 and 85,595.58 is: 118,118.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,215.71 : 216,950.54 = 85,595.58 : x
  2. Step 2: Convert to fraction form
    157,215.71/216,950.54 = 85,595.58/x
  3. Step 3: Cross multiply
    157,215.71x = 216,950.54 × 85,595.58
  4. Step 4: Simplify right side
    157,215.71x = 18,570,006,874.64
  5. Step 5: Solve for x
    x = 18,570,006,874.64/157,215.71
  6. Step 6: Final answer
    x = 118,118.01

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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.