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Finding the Fourth Proportional to 157,228.71, 216,972.81 and 85,607.43

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Solution

The fourth proportional to 157,228.71, 216,972.81 and 85,607.43 is: 118,136.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,228.71 : 216,972.81 = 85,607.43 : x
  2. Step 2: Convert to fraction form
    157,228.71/216,972.81 = 85,607.43/x
  3. Step 3: Cross multiply
    157,228.71x = 216,972.81 × 85,607.43
  4. Step 4: Simplify right side
    157,228.71x = 18,574,484,643.98
  5. Step 5: Solve for x
    x = 18,574,484,643.98/157,228.71
  6. Step 6: Final answer
    x = 118,136.72

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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.