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Finding the Fourth Proportional to 105,658.92, 145,548.90 and 90,502.20

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Solution

The fourth proportional to 105,658.92, 145,548.90 and 90,502.20 is: 124,669.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,658.92 : 145,548.90 = 90,502.20 : x
  2. Step 2: Convert to fraction form
    105,658.92/145,548.90 = 90,502.20/x
  3. Step 3: Cross multiply
    105,658.92x = 145,548.90 × 90,502.20
  4. Step 4: Simplify right side
    105,658.92x = 13,172,495,657.58
  5. Step 5: Solve for x
    x = 13,172,495,657.58/105,658.92
  6. Step 6: Final answer
    x = 124,669.98

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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.