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Finding the Fourth Proportional to 91,808,485.80, 137,712,728.70 and 86,547,219.90

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Solution

The fourth proportional to 91,808,485.80, 137,712,728.70 and 86,547,219.90 is: 129,820,829.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,808,485.80 : 137,712,728.70 = 86,547,219.90 : x
  2. Step 2: Convert to fraction form
    91,808,485.80/137,712,728.70 = 86,547,219.90/x
  3. Step 3: Cross multiply
    91,808,485.80x = 137,712,728.70 × 86,547,219.90
  4. Step 4: Simplify right side
    91,808,485.80x = 11,918,653,813,827,940
  5. Step 5: Solve for x
    x = 11,918,653,813,827,940/91,808,485.80
  6. Step 6: Final answer
    x = 129,820,829.85

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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.