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Finding the Fourth Proportional to 99,695.40, 149,543.10 and 90,709.80

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Solution

The fourth proportional to 99,695.40, 149,543.10 and 90,709.80 is: 136,064.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,695.40 : 149,543.10 = 90,709.80 : x
  2. Step 2: Convert to fraction form
    99,695.40/149,543.10 = 90,709.80/x
  3. Step 3: Cross multiply
    99,695.40x = 149,543.10 × 90,709.80
  4. Step 4: Simplify right side
    99,695.40x = 13,565,024,692.38
  5. Step 5: Solve for x
    x = 13,565,024,692.38/99,695.40
  6. Step 6: Final answer
    x = 136,064.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.