Home / 102,972.60-142,103.70-62,688.08

Finding the Fourth Proportional to 102,972.60, 142,103.70 and 62,688.08

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Solution

The fourth proportional to 102,972.60, 142,103.70 and 62,688.08 is: 86,510.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,972.60 : 142,103.70 = 62,688.08 : x
  2. Step 2: Convert to fraction form
    102,972.60/142,103.70 = 62,688.08/x
  3. Step 3: Cross multiply
    102,972.60x = 142,103.70 × 62,688.08
  4. Step 4: Simplify right side
    102,972.60x = 8,908,208,113.90
  5. Step 5: Solve for x
    x = 8,908,208,113.90/102,972.60
  6. Step 6: Final answer
    x = 86,510.47

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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.