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Finding the Fourth Proportional to 99,041.40, 148,484.34 and 67,781.88

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Solution

The fourth proportional to 99,041.40, 148,484.34 and 67,781.88 is: 101,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,041.40 : 148,484.34 = 67,781.88 : x
  2. Step 2: Convert to fraction form
    99,041.40/148,484.34 = 67,781.88/x
  3. Step 3: Cross multiply
    99,041.40x = 148,484.34 × 67,781.88
  4. Step 4: Simplify right side
    99,041.40x = 10,064,547,715.76
  5. Step 5: Solve for x
    x = 10,064,547,715.76/99,041.40
  6. Step 6: Final answer
    x = 101,619.60

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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.