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Finding the Fourth Proportional to 90,800.80, 136,492.80 and 64,686.40

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Solution

The fourth proportional to 90,800.80, 136,492.80 and 64,686.40 is: 97,237.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,800.80 : 136,492.80 = 64,686.40 : x
  2. Step 2: Convert to fraction form
    90,800.80/136,492.80 = 64,686.40/x
  3. Step 3: Cross multiply
    90,800.80x = 136,492.80 × 64,686.40
  4. Step 4: Simplify right side
    90,800.80x = 8,829,227,857.92
  5. Step 5: Solve for x
    x = 8,829,227,857.92/90,800.80
  6. Step 6: Final answer
    x = 97,237.34

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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.