Home / 155,807,717-215,020,980.42-86,191,897.64

Finding the Fourth Proportional to 155,807,717, 215,020,980.42 and 86,191,897.64

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Solution

The fourth proportional to 155,807,717, 215,020,980.42 and 86,191,897.64 is: 118,948,320.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,807,717 : 215,020,980.42 = 86,191,897.64 : x
  2. Step 2: Convert to fraction form
    155,807,717/215,020,980.42 = 86,191,897.64/x
  3. Step 3: Cross multiply
    155,807,717x = 215,020,980.42 × 86,191,897.64
  4. Step 4: Simplify right side
    155,807,717x = 18,533,066,334,813,084
  5. Step 5: Solve for x
    x = 18,533,066,334,813,084/155,807,717
  6. Step 6: Final answer
    x = 118,948,320.99

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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.