Home / 78,417,920.80-117,626,881.20-46,085,312.80

Finding the Fourth Proportional to 78,417,920.80, 117,626,881.20 and 46,085,312.80

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Solution

The fourth proportional to 78,417,920.80, 117,626,881.20 and 46,085,312.80 is: 69,127,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,417,920.80 : 117,626,881.20 = 46,085,312.80 : x
  2. Step 2: Convert to fraction form
    78,417,920.80/117,626,881.20 = 46,085,312.80/x
  3. Step 3: Cross multiply
    78,417,920.80x = 117,626,881.20 × 46,085,312.80
  4. Step 4: Simplify right side
    78,417,920.80x = 5,420,871,613,790,439
  5. Step 5: Solve for x
    x = 5,420,871,613,790,439/78,417,920.80
  6. Step 6: Final answer
    x = 69,127,969.20

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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.