Home / 85,966,420.17-128,707,478.57-77,249,459.17

Finding the Fourth Proportional to 85,966,420.17, 128,707,478.57 and 77,249,459.17

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Solution

The fourth proportional to 85,966,420.17, 128,707,478.57 and 77,249,459.17 is: 115,656,591.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,966,420.17 : 128,707,478.57 = 77,249,459.17 : x
  2. Step 2: Convert to fraction form
    85,966,420.17/128,707,478.57 = 77,249,459.17/x
  3. Step 3: Cross multiply
    85,966,420.17x = 128,707,478.57 × 77,249,459.17
  4. Step 4: Simplify right side
    85,966,420.17x = 9,942,583,111,020,874
  5. Step 5: Solve for x
    x = 9,942,583,111,020,874/85,966,420.17
  6. Step 6: Final answer
    x = 115,656,591.15

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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.