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Finding the Fourth Proportional to 99,569.80, 149,354.70 and 64,140.40

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Solution

The fourth proportional to 99,569.80, 149,354.70 and 64,140.40 is: 96,210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,569.80 : 149,354.70 = 64,140.40 : x
  2. Step 2: Convert to fraction form
    99,569.80/149,354.70 = 64,140.40/x
  3. Step 3: Cross multiply
    99,569.80x = 149,354.70 × 64,140.40
  4. Step 4: Simplify right side
    99,569.80x = 9,579,670,199.88
  5. Step 5: Solve for x
    x = 9,579,670,199.88/99,569.80
  6. Step 6: Final answer
    x = 96,210.60

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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.