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Finding the Fourth Proportional to 124,688.16, 172,014.84 and 74,358

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Solution

The fourth proportional to 124,688.16, 172,014.84 and 74,358 is: 102,581.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,688.16 : 172,014.84 = 74,358 : x
  2. Step 2: Convert to fraction form
    124,688.16/172,014.84 = 74,358/x
  3. Step 3: Cross multiply
    124,688.16x = 172,014.84 × 74,358
  4. Step 4: Simplify right side
    124,688.16x = 12,790,679,472.72
  5. Step 5: Solve for x
    x = 12,790,679,472.72/124,688.16
  6. Step 6: Final answer
    x = 102,581.35

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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.