Home / 128,427,140.40-177,228,554.85-69,688,311.72

Finding the Fourth Proportional to 128,427,140.40, 177,228,554.85 and 69,688,311.72

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Solution

The fourth proportional to 128,427,140.40, 177,228,554.85 and 69,688,311.72 is: 96,169,382.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,427,140.40 : 177,228,554.85 = 69,688,311.72 : x
  2. Step 2: Convert to fraction form
    128,427,140.40/177,228,554.85 = 69,688,311.72/x
  3. Step 3: Cross multiply
    128,427,140.40x = 177,228,554.85 × 69,688,311.72
  4. Step 4: Simplify right side
    128,427,140.40x = 12,350,758,776,071,918
  5. Step 5: Solve for x
    x = 12,350,758,776,071,918/128,427,140.40
  6. Step 6: Final answer
    x = 96,169,382.40

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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.